(a) Authority to Initiate Trading Halts or Pauses

In circumstances in which the Exchange deems it necessary to protect investors and the public interest, and pursuant to the procedures set forth in this Rule:

(1) The Exchange may halt trading on PSX of a security listed on another national securities exchange when such exchange imposes a trading halt in that security because of an order imbalance or influx ("operational trading halt"). In the event that the Exchange initiates a trading halt based on another exchange's operational trading halt, PSX may resume trading and permit PSX Participants to commence entry of orders and quotations and trading at any time following initiation of the other exchange's operational trading halt.

(2) Limit Up-Limit Down Mechanism.

(A) Definitions.

(1) "Plan" means the Plan to Address Extraordinary Market Volatility Submitted to the Securities and Exchange Commission Pursuant to Rule 608 of Regulation NMS under the Securities Exchange Act of 1934, Exhibit A to Securities Exchange Act Release No. 67091 (May 31, 2012), 77 FR 33498 (June 6, 2012).

(2) All capitalized terms not otherwise defined in this Rule shall have the meanings set forth in the Plan or Exchange rules, as applicable.

(B) Exchange Participation in the Plan. The Exchange is a Participant in, and subject to the applicable requirements of, the Plan, which establishes procedures to address extraordinary volatility in NMS Stocks.

(C) Member Organization Compliance. Member organizations shall comply with the applicable provisions of the Plan.

(D) Exchange Compliance with the Plan. Exchange systems shall not display or execute buy (sell) interest above (below) the Upper (Lower) Price Bands, unless such interest is specifically exempted under the Plan.

(E) Repricing and Cancellation of Interest. Exchange systems shall reprice and/or cancel buy (sell) interest that is priced or could be executed above (below) the Upper (Lower) Price Band. Any interest that is repriced pursuant to this Rule shall receive a new time stamp and new execution priority.

(1) Market Orders. If a market order with a time in force other than Immediate or Cancel cannot be fully executed at or within the Price Bands, Exchange systems shall post the unexecuted portion of the buy (sell) market order at the Upper (Lower) Price Band.

(2) Limit-priced Interest. Both displayable and non-displayable incoming limit-priced interest to buy (sell) that is priced above (below) the Upper (Lower) Price Band shall be repriced to the Upper (Lower) Price Band.

(a) For limit-priced orders entered via the OUCH protocol, the order shall be re-priced upon entry only if the Price Bands are such that the price of the limit-priced interest to buy (sell) would be above (below) the upper (lower) Price Band. Once slid:

(i) if the Price Bands move such that the price of the order to buy (sell) would be below (above) the lower (upper) Price Band, the order will not be re-priced again. Rather, the order will either remain on the book at the same price or be cancelled back to the entering party, depending on how the entering party has configured its order entry port.

(ii) if the Price Bands move such that the price of the order to buy (sell) would be above (below) the upper (lower) Price Band, the order will not be re-priced again. Rather, the order will be cancelled.

(b) For limit-priced orders entered via RASH or FIX protocols, the order shall be eligible to be repriced by the system multiple times if the Price Bands move such that the price of resting limit-priced interest to buy (sell) would be above (below) the upper (lower) Price Band. Once slid, if the Price Bands again move such that the price of resting limit interest to buy (sell) would be below (above) the upper (lower) Price Band the order will continue to be repriced either to its original limit price or to the new price bands, whichever is less aggressive.

(3) IOC Orders. If an IOC order cannot be fully executed at or within the Price Bands, Exchange systems shall cancel any unexecuted portion of the IOC Order.

(4) Routable Orders. Exchange systems shall not route buy (sell) interest to an away market displaying a sell (buy) quote that is above (below) the Upper (Lower) Price Band. Orders that are eligible to be routed to away destinations will be price slid before routing if the buy (sell) is priced above (below) the Upper (Lower) Price Band.

(5) Sell Short Orders. During a Short Sale Price Test, as defined in Equity 4, Rule 3303, Short Sale Orders priced below the Lower Price Band shall be repriced to the higher of the Lower Price Band or the Permitted Price, as defined in Equity 4, Rule 3303.

(b) Definitions. For purposes of this Rule:

(1) "Derivative Securities Product" means a series of Trust Shares, Index Fund Shares, Managed Fund Shares or Trust Issued Receipts, a series of Commodity-Related Securities (as defined in Equity 10, Section 8), securities representing interests in unit investment trusts or investment companies, or any other derivative security traded on PSX.

(A) The term "Trust Shares" means a security (a) that is based on a unit investment trust ("Trust") which holds the securities which comprise an index or portfolio underlying a series of Trust Shares; (b) that is issued by the Trust in a specified aggregate minimum number in return for a "Portfolio Deposit" consisting of specified numbers of shares of stock plus a cash amount; (c) that, when aggregated in the same specified minimum number, may be redeemed from the Trust which will pay to the redeeming holder the stock and cash then comprising the "Portfolio Deposit"; and (d) that pays holders a periodic cash payment corresponding to the regular cash dividends or distributions declared with respect to the component securities of the stock index or portfolio of securities underlying the Trust Shares, less certain expenses and other charges as set forth in the Trust prospectus.

(B) The term "Index Fund Shares" means a security (a) that is issued by an open-end management investment company based on a portfolio of stocks that seeks to provide investment results that correspond generally to the price and yield performance of specified foreign or domestic stock index; (b) that is issued by such an open-end management investment company in a specified aggregate minimum number in return for a deposit of specified numbers of shares of stock and/or a cash amount with a value equal to the next determined net asset value; and (c) that, when aggregated in the same specified minimum number, may be redeemed at a holder's request by such open-end investment company which will pay to the redeeming holder the stock and/or cash with a value equal to the next determined net asset value.

(C) The term "Managed Fund Shares" means a security that (a) represents an interest in a registered investment company ("Investment Company") organized as an open-end management investment company or similar entity, that invests in a portfolio of securities selected by the Investment Company's investment adviser consistent with the Investment Company's investment objectives and policies; (b) is issued in a specified aggregate minimum number in return for a deposit of a specified portfolio of securities and/or a cash amount with a value equal to the next determined net asset value; and (c) when aggregated in the same specified minimum number, may be redeemed at a holder's request, which holder will be paid a specified portfolio of securities and/or cash with a value equal to the next determined net asset value.

(D) The term "Trust Issued Receipts" means a security (a) that is issued by a trust ("Trust") which holds specified securities deposited with the Trust; (b) that, when aggregated in some specified minimum number, may be surrendered to the Trust by the beneficial owner to receive the securities; and (c) that pays beneficial owners dividends and other distributions on the deposited securities, if any are declared and paid to the trustee by an issuer of the deposited securities.

(2) "Pre-Market Session" means the trading session that begins at 8:00 a.m. and continues until 9:30 a.m.

(3) "Post-Market Session" means the trading session that begins at 4:00 p.m. or 4:15 p.m., and that continues until 5:00 p.m.

(4) "Regular Market Session" means the trading session from 9:30 a.m. until 4:00 p.m. or 4:15 p.m.

(5) The term "UTP Listing Market" means the primary listing market for a UTP Security.

(6) The term "UTP Regulatory Halt" means a trade suspension, halt, or pause called by the UTP Listing Market in a UTP Security that requires all market centers to halt trading in that security.

(7) The term "UTP Security" means a security that is listed on a national securities exchange other than the Exchange and that trades on the Exchange pursuant to unlisted trading privileges.

(c) Procedure for Initiating and Terminating a Trading Halt

(1) Should the Exchange determine that a basis exists under Equity 4, Rule 3100 for initiating a trading halt, the commencement of the trading halt will be effective at the time specified by the Exchange in a notice posted on a publicly available Exchange website. In addition, the Exchange shall disseminate notice of the commencement of a trading halt through major wire services.

(2) Trading in a halted security shall resume at the time specified by the Exchange in a notice posted on a publicly available Exchange website. In addition, the Exchange shall disseminate notice of the resumption of trading through major wire services.

(3) A trading halt initiated under this Rule shall be terminated when the Exchange releases the security for trading, at a time announced to market participants in advance by the Exchange.

(d) UTP Regulatory Halts. If the UTP Listing Market, as defined in (b)(5) above, declares a UTP Regulatory Halt, as defined in (b)(6) above, the Exchange will halt trading in that security until it receives notification from the UTP Listing Market that the halt or suspension is no longer in effect or as provided for in Equity 4, Rule 3100(a)(2) and Equity 4, Rule 3101 provided that, during Regular Market Session, the Exchange will halt trading until it receives the first Price Band in that security. If a UTP Regulatory Halt was issued for the purpose of dissemination of material news, the Exchange will assume that adequate publication or dissemination has occurred upon the expiration of one hour after initial publication in a national news dissemination service of the information that gave rise to an UTP Regulatory Halt and may, at its discretion, reopen trading at that time, notwithstanding notification from the UTP Listing Market that the halt or suspension is no longer in effect.

(e) The Exchange will not conduct a halt cross or re-opening cross in a UTP Security and will process new and existing orders in a UTP Security during a trading halt as follows:

(1) cancel any unexecuted portion of Midpoint Peg and Midpoint Peg Post-Only Orders;

(2) maintain all other resting Orders in the Exchange Book at their last ranked price and displayed price;

(3) accept and process all cancellations; and

(4) Orders, including Order modifications, entered during the trading halt or pause will not be accepted.

(f) Halts in Exchange Traded Products. Trading Halts for UTP Exchange Traded Products. A "UTP Exchange Traded Product" means one of the following Exchange Traded Products that trades on the Exchange pursuant to unlisted trading privileges: Equity Linked Notes, Investment Company Units, Index Fund Shares, NextShares, Index-Linked Exchangeable Notes, Equity Gold Shares, Equity Index-Linked Securities, Commodity-Linked Securities, Currency-Linked Securities, Fixed-Income Index-Linked Securities, Futures-Linked Securities, Multifactor-Index-Linked Securities, Trust Certificates, Currency and Index Warrants, Portfolio Depository Receipts, Trust Issued Receipts, Commodity-Based Trust Shares, Currency Trust Shares, Commodity Index Trust Shares, Commodity Futures Trust Shares, Partnership Units, Paired Trust Shares, Trust Units, Managed Fund Shares, and Managed Trust Securities.

(1) Pre-Market Session. If a UTP Exchange Traded Product begins trading on the Exchange in the Pre-Market Session and subsequently a temporary interruption occurs in the calculation or wide dissemination of the Intraday Indicative Value ("IIV") or the value of the underlying index, as applicable, to such UTP Exchange Traded Product, by a major market data vendor, the Exchange may continue to trade the UTP Exchange Traded Product for the remainder of the Pre-Market Session.

(2) Regular Market Session. During the Regular Market Session, if a temporary interruption occurs in the calculation or wide dissemination of the applicable IIV or value of the underlying index by a major market data vendor and the listing market halts trading in the UTP Exchange Traded Product, the Exchange, upon notification by the primary listing market of such halt due to such temporary interruption, also shall immediately halt trading in the UTP Exchange Traded Product on the Exchange.

(3) Post-Market Session and Next Business Day's Pre-Market Session.

(A) If the IIV or the value of the underlying index continues not to be calculated or widely available after the close of the Regular Market Session, the Exchange may trade the UTP Exchange Traded Product in the Post-Market Session only if the listing market traded such securities until the close of its regular trading session without a halt.

(B) If the IIV or the value of the underlying index continues not to be calculated or widely available as of the commencement of the Pre-Market Session on the next business day, the Exchange shall not commence trading of the UTP Exchange Traded Product in the Pre-Market Session that day. If an interruption in the calculation or wide dissemination of the IIV or the value of the underlying index continues, the Exchange may resume trading in the UTP Exchange Traded Product only if calculation and wide dissemination of the IIV or the value of the underlying index resumes or trading in the UTP Exchange Traded Product resumes in the primary listing market.

Adopted Jan. 22, 2021 (SR-Phlx-2021-04); amended Sep. 9, 2022 (SR-Phlx-2022-35), operative Oct. 10, 2022.

(a) The Exchange shall halt trading in all stocks and shall not reopen for the time periods specified in this Rule if there is a Level 1, 2, or 3 Market Decline.

(i) For purposes of this Rule, a Market Decline means a decline in price of the S&P 500® Index between 9:30 a.m. EST and 4:00 p.m. EST on a trading day as compared to the closing price of the S&P 500® Index for the immediately preceding trading day. The Level 1, Level 2, and Level 3 Market Declines that will be applicable for the trading day will be publicly disseminated before 9:30 a.m. EST.

(ii) A "Level 1 Market Decline" means a Market Decline of 7%.

(iii) A "Level 2 Market Decline" means a Market Decline of 13%.

(iv) A "Level 3 Market Decline" means a Market Decline of 20%.

(b) Halts in Trading.

(i) If a Level 1 Market Decline or a Level 2 Market Decline occurs after 9:30 a.m. and up to and including 3:25 p.m, EST or in the case of an early scheduled close, 12:25 p.m. EST the Exchange shall halt trading in all stocks for 15 minutes after a Level 1 or Level 2 Market Decline. The Exchange shall halt trading based on a Level 1 or Level 2 Market Decline only once per trading day. The Exchange will not halt trading if a Level 1 Market Decline or a Level 2 Market Decline occurs after 3:25 p.m. EST or in the case of an early scheduled close, 12:25 p.m. EST.

(ii) If a Level 3 Market Decline occurs at any time during the trading day, the Exchange shall halt trading in all stocks for the remainder of the trading day. 

(c) Re-opening of Trading

(i) The re-opening of trading following a Level 1 or 2 trading halt shall follow procedures set forth in Equity 4, Rule 3100.

(ii) If the primary listing market halts trading in all stocks, the Exchange will halt trading in those stocks until trading has resumed on the primary listing market or notice has been received from the primary listing market that trading may resume. If the primary listing market does not reopen a security within 15 minutes following the end of the 15-minute halt period, the Exchange may resume trading in that security.

(d) Nothing in this Rule should be construed to limit the ability of the Exchange to otherwise halt, suspend, or pause the trading in any stock or stocks traded on the Exchange pursuant to any other Exchange rule or policy.

(e) Market-Wide Circuit Breaker ("MWCB") Testing

(1) The Exchange will participate in all industry-wide tests of the MWCB mechanism. Members designated pursuant to General 2, Section 12(a) to participate in Exchange Business Continuity and Disaster Recovery testing are required to participate in at least one industry-wide MWCB test each year and to verify their participation in that test by attesting that they are able to or have attempted to:

(A) receive and process MWCB halt messages from the securities information processors ("SIPs");

(B) receive and process resume messages from the SIPs following a MWCB halt;

(C) receive and process market data from the SIPs relevant to MWCB halts; and

(D) send orders following a Level 1 or Level 2 MWCB halt in a manner consistent with their usual trading behavior.

(2) To the extent that a member participating in a MWCB test is unable to receive and process any of the messages identified in paragraph (e)(1)(A)-(D) of this Rule, its attestation should notify the Exchange which messages it was unable to process and if known, why.

(3) Members not designated pursuant to standards established in General 2, Section 12(a) are permitted to participate in any MWCB test.

(f) In the event that a halt is triggered under this Rule following a Level 1, Level 2, or Level 3 Market Decline, the Exchange, together with other SROs and industry representatives (the "MWCB Working Group"), will review such event. The MWCB Working Group will prepare a report that documents its analysis and recommendations and will provide that report to the Commission within 6 months of the event.

(g) In the event that there is (1) a Market Decline of more than 5%, or (2) an SRO implements a rule that changes its reopening process following a MWCB Halt, the Exchange, together with the MWCB Working Group, will review such event and consider whether any modifications should be made to this Rule. If the MWCB Working Group recommends that a modification should be made to this Rule, the MWCB Working Group will prepare a report that documents its analysis and recommendations and provide that report to the Commission.

Adopted Jan. 22, 2021 (SR-Phlx-2021-04); amended October 6, 2021 (SR-Phlx-2021-60); amended Mar. 10, 2022 (SR-Phlx-2022-11); amended Apr. 12, 2022 (SR-Phlx-2022-18).

(a) The Exchange, including for purposes of this Rule its officers, directors and employees, shall not be liable for any damages sustained by a member, member organization, or person associated with any of the foregoing, arising out of or relating to the use or enjoyment by such person or entity of the facilities afforded by the Exchange to members for the conduct of their business.

(b) The cost to the Exchange of producing, pursuant to court order or other legal process, records relating to the business or affairs of a member, member organization, or person associated with any of the foregoing, may, in the discretion of the Exchange, be required to be paid to the Exchange by such person or entity, whether such production is required at the instance of such person or entity, or at the instance of any other party.

(c) In the event any action or proceeding is brought, or claim made, to impose liability on the Exchange for an alleged failure on its part to prevent or to require action by a member, member organization, or person associated with any of the foregoing, such person or entity may, in the discretion of the Exchange, be required to reimburse the Exchange for:

(1) all expenses, including counsel fees, incurred by the Exchange in connection with said action, proceeding, or claim, (2) the recovery, if any, adjudged against the Exchange upon a final determination that the Exchange was liable for the damage sustained, and (3) any payment made by the Exchange with the approval of the member, member organization, or person associated with any of the foregoing in connection with any settlement of any such action, proceeding, or claim; provided, however, that no member, member organization, or person associated with any of the foregoing shall be required to reimburse the Exchange for any fine or any other civil penalty imposed on the Exchange by the Securities and Exchange Commission ("Commission") or any other governmental entity for a violation by the Exchange of any provision of the Act or of any Commission regulation, or where indemnification would otherwise be prohibited by law.

(2) Each member organization that physically conducts a business on the Exchange's trading floor is required, at its sole cost, to procure and maintain liability insurance that provides defense and indemnity coverage for itself, any person associated with it and the Exchange for any action or proceeding brought, or claim made, to impose liability upon such member organization, associated person or the Exchange resulting from, relating to, or arising out of the conduct of the member organization or associated person (hereinafter, "Insurance"). The Insurance shall further provide defense and indemnity coverage to the Exchange for the Exchange's sole, concurrent, or contributory negligence, or other wrongdoing, relating to or in connection with such claim. The Exchange shall be expressly named by endorsement as an Additional Insured under the Insurance. The Exchange's status and rights to coverage under the Insurance shall be the same rights of the named insured of the Insurance, including, without limitation, rights to the full policy limits. In addition:

(i) The limits for the Insurance shall be not less than $1,000,000 without erosion by defense costs, but under no circumstance shall the Exchange be entitled to less than the full policy limits of such Insurance.

(ii) The Insurance shall state that it is primary to any insurance maintained by the Exchange.

(iii) Each member organization annually shall cause a certificate of insurance to be issued directly to the Exchange demonstrating that insurance compliant with this Rule has been procured and is maintained. Each member organization also shall furnish a copy of the Insurance to the Exchange for review upon the Exchange's request at any time.

(a) This section (2) is the only section of this Rule specifically limited to member organizations physically located on the Exchange's trading floor.

(d) In the event that a member, member organization, or person associated with any of the foregoing fails to remit any amount due the Exchange under this Rule or General 2, Section 3, such person shall be responsible for all costs of collection incurred by the Exchange, including counsel fees. This subsection does not apply to any objection or appeal by a member, member organization, or person associated with any of the foregoing considered by the Exchange or the Commission, or any appeal from a decision of the Commission.

(e) Subparagraphs (a), (b) & (c) of this Rule shall apply to any action, proceeding, claim, or other legal process brought, made, or asserted on or after the date of the filing of this Rule with the Commission.   Subparagraph (d) of this Rule shall apply to any costs incurred by the Exchange upon approval of this Rule.

Adopted Jan. 22, 2021 (SR-Phlx-2021-04).

(a) Participants may express their trading interest in PSX by entering Orders. PSX offers a range of Order Types that behave in the manner specified for each particular Order Type. Each Order Type may be assigned certain Order Attributes that further define its behavior. All Order Types and Order Attributes operate in a manner that is reasonably designed to comply with the requirements of Rules 610 and 611 under Regulation NMS. Each Order must designate whether it is to effect a buy, a long sale, a short sale, or an exempt short sale.

The Exchange maintains several communications protocols for Participants to use in entering Orders and sending other messages to PSX:

• OUCH is an Exchange proprietary protocol. 
  
• RASH is an Exchange proprietary protocol. 
  
• FLITE is an Exchange proprietary protocol.
  
• FIX is a non-proprietary protocol.
  

Except where otherwise stated, all protocols are available for all Order Types and Order Attributes.

Upon entry, an Order is processed to determine whether it may execute against any contra-side Orders on the PSX Book in accordance with the parameters applicable to the Order Type and Order Attributes selected by the Participant and in accordance with the priority for Orders on the PSX Book provided in Equity 4, Rule 3307. In addition, the Order may have its price adjusted in accordance with applicable parameters and may be routed to other market centers for potential execution if designated as Routable. The Order may then be posted to the PSX Book if consistent with the parameters of the Order Type and Order Attributes selected by the Participant. Thereafter, as detailed in Rules 3301A, 3301B, and 3315, there are numerous circumstances in which the Order on the PSX Book may be modified and receive a new timestamp. The sole instances in which the modification of an Order on the PSX Book will not result in a new timestamp are: (i) a decrease in the size of the Order due to execution or modification by the Participant or by the System, and (ii) a re-designation of a sell Order as a long sale, a short sale, or an exempt short sale. Whenever an Order receives a new timestamp for any reason, it is processed by the System as a new Order with respect to potential execution against Orders on the PSX Book, price adjustment, routing, reposting to the PSX Book, and subsequent execution against incoming Orders, except where otherwise stated.

All Orders are also subject to cancellation and/or repricing and reentry onto the PSX Book in the circumstances described in Equity 4, Rule 3100(a)(5) (providing for compliance with Plan to Address Extraordinary Market Volatility) and Equity 4, Rule 3303 (providing for compliance with Regulation SHO). In all circumstances where an Order is repriced pursuant to those provisions, it is processed by the System as a new Order with respect to potential execution against Orders on the PSX Book, price adjustment, routing reposting to the PSX Book, and subsequent execution against incoming Orders. If multiple Orders at a given price are repriced, the Order in which they are reentered is random, based on the respective processing time for each such Order; provided, however, that in the case of Price to Comply Orders and Post-Only Orders that have their prices adjusted upon entry because they lock a Protected Quotation but that are subsequently displayed at their original entered limit price as provided in Rules 3301A(b)(1)(B) and (4)(B), they are processed in accordance with the time priority under which they were previously ranked on the PSX Book. 

(b) Except where stated otherwise, the following Order Types are available to all Participants:

(1)

(A) A "Price to Comply Order" is an Order Type designed to comply with Rule 610(d) under Regulation NMS by avoiding the display of quotations that lock or cross any Protected Quotation in a System Security during Market Hours. The Price to Comply Order is also designed to provide potential price improvement.

When a Price to Comply Order is entered, the Price to Comply Order will be executed against previously posted Orders on the PSX Book that are priced equal to or better than the price of the Price to Comply Order, up to the full amount of such previously posted Orders, unless such executions would trade through a Protected Quotation. Any portion of the Order that cannot be executed in this manner will be posted on the PSX Book (and/or routed if it has been designated as Routable).

During Market Hours, the price at which a Price to Comply Order is posted is determined in the following manner. If the entered limit price of the Price to Comply Order would lock or cross a Protected Quotation and the Price to Comply Order could not execute against an Order on the PSX Book at a price equal to or better than the price of the Protected Quotation, the Price to Comply Order will be displayed on the PSX Book at a price one minimum price increment lower than the current Best Offer (for a Price to Comply Order to buy) or higher than the current Best Bid (for a Price to Comply Order to sell) but will also be ranked on the PSX Book with a non-displayed price equal to the current Best Offer (for a Price to Comply Order to buy) or to the current Best Bid (for a Price to Comply Order to sell). For example, if a Price to Comply Order to buy at $11 would lock a Protected Offer of $11, the Price to Comply Order will be ranked at a non-displayed price of $11 but will be displayed at $10.99. An incoming Order to sell at a price of $11 or lower would execute against the Price to Comply Order at $11 (unless the incoming Order was an Order Type that was not immediately executable, in which case the incoming Order would behave in the manner specified for that Order Type).

During Pre-Market Hours and Post-Market Hours, a Price to Comply Order will be ranked and displayed at its entered limit price without adjustment.

(B) If a Price to Comply Order is entered through RASH or FIX, during Market Hours the price of the Price to Comply Order will be adjusted in the following manner after initial entry and posting to the PSX Book (unless the Order is assigned a Routing Order Attribute that would cause it to be routed to another market center rather than remaining on the PSX Book):

• If the entered limit price of the Price to Comply Order locked or crossed a Protected Quotation and the NBBO changes, the displayed and non-displayed price of the Price to Comply Order will be adjusted repeatedly in accordance with changes to the NBBO; provided, however, that if the quotation of another market center moves in a manner that would lock or cross the displayed price of a Price to Comply Order, the prices of the Price to Comply Order will not be adjusted. For example, if a Price to Comply Order to buy at $11.02 would cross a Protected Offer of $11, the Order will be ranked at a non-displayed price of $11 but will be displayed at $10.99. If the Best Offer then moves to $11.01, the displayed price will be changed to $11 and the Order will be ranked at a non-displayed price of $11.01. However, if another market center then displays an offer of $11 (thereby locking the previously displayed price of the Price to Comply Order, notwithstanding Rule 610(d) under Regulation NMS), the price of the Price to Comply Order will not be changed. The Order may be repriced repeatedly until such time as the Price to Comply Order is able to be ranked and displayed at its original entered limit price ($11.02 in the example). The Price to Comply Order receives a new timestamp each time its price is changed.
  
• If the original entered limit price of the Price to Comply Order would no longer lock or cross a Protected Quotation, the Price to Comply Order will be ranked and displayed at that price and will receive a new timestamp, and will not thereafter be adjusted under this paragraph (B).
  

If a Price to Comply Order is entered through OUCH or FLITE, during Market Hours the price of the Price to Comply Order may be adjusted in the following manner after initial entry and posting to the PSX Book: 

• If the entered limit price of the Price to Comply Order crossed a Protected Quotation and the NBBO changes so that the Price to Comply Order could be displayed at a price at or closer to its entered limit price without locking or crossing a Protected Quotation, the Price to Comply Order may either remain on the PSX Book unchanged or may be cancelled back to the Participant, depending on its choice. For example, if a Price to Comply Order to buy at $11.02 would cross a Protected Offer of $11, the Order will be ranked a non-displayed price of $11 but will be displayed at $10.99. If the Best Offer changes to $11.01, the Order will not be repriced, but rather will either remain with a displayed price of $10.99 but ranked at a non-displayed price of $11 or be cancelled back to the Participant, depending on its choice. A Participant's choice with regard to maintaining the Price to Comply Order or cancelling it is set in advance for each port through which the Participant enters Orders.
  
• If the entered limit price of the Price to Comply Order locked a Protected Quotation, the price of the Price to Comply Order will be adjusted after initial entry only as follows. If the entered limit price would no longer lock a Protected Quotation, the Price to Comply Order may either remain on the PSX Book unchanged, may be cancelled back to the Participant, or may be ranked and displayed at its original entered limit price, depending on the Participant's choice. For example, if a Price to Comply Order to buy at $11 would lock a Protected Offer of $11, the Price to Comply Order will be ranked at a non-displayed price of $11 but will be displayed at $10.99. If the Best Offer changes to $11.01, the Price to Comply Order may either remain with a displayed price of $10.99 but ranked at a non-displayed price of $11, be cancelled back to the Participant, or be ranked and displayed at $11, depending on the Participant's choice. A Participant's choice with regard to maintaining the Price to Comply Order, cancelling it, or allowing it to be displayed is set in advance for each port through which the Participant enters Orders. If the Price to Comply Order is ranked and displayed at its original entered limit price, it will receive a new timestamp, and will not thereafter be adjusted under this paragraph (B).
  

(C) The following Order Attributes may be assigned to a Price to Comply Order:

• Price. As described above, the price of the Order may be adjusted to avoid locking or crossing a Protected Quotation, and may include a displayed price as well as a non-displayed price.
  
• Size.
  
• Reserve Size (available through OUCH, RASH and FIX only).
  
• A Time-in-Force other than IOC. (A Price to Comply Order entered with a Time-in-Force of IOC would be processed as a Non-Displayed Order with a Time-in-Force of IOC).
  
• Designation as an ISO. In accordance with Regulation NMS, a Price to Comply Order designated as an ISO would be processed at its entered limit price, since such a designation reflects a representation by the Participant that it has simultaneously routed one or more additional limit orders, as necessary, to execute against the full displayed size of any Protected Quotations that the Price to Comply Order would lock or cross.
  
• Routing (available through RASH and FIX only).
  
• Primary Pegging and Market Pegging (available through OUCH, RASH and FIX only).
  
• Discretion (available through OUCH, RASH and FIX only).
  
• Display. A Price to Comply Order is always displayed, although, as provided above, it may also have a non-displayed price and/or Reserve Size.
  
• Trade Now (available through OUCH, RASH, FLITE and FIX).
  

(2)

(A) A "Price to Display Order" is an Order Type designed to comply with Rule 610(d) under Regulation NMS by avoiding the display of quotations that lock or cross any Protected Quotation in a System Security during Market Hours. Price to Display Orders are available solely to Participants that are Market Makers for System Securities.

When a Price to Display Order is entered, if its entered limit price would lock or cross a Protected Quotation, the Price to Display Order will be repriced to one minimum price increment lower than the current Best Offer (for a Price to Display Order to buy) or higher than the current Best Bid (for a Price to Display Order to sell). For example, if a Price to Display Order to buy at $11 would cross a Protected Offer of $10.99, the Price to Display Order will be repriced to $10.98. The Price to Display Order (whether repriced or not repriced) will then be executed against previously posted Orders on the PSX Book that are priced equal to or better than the adjusted price of the Price to Display Order, up to the full amount of such previously posted Orders, unless such executions would trade through a Protected Quotation. Any portion of the Order that cannot be executed in this manner will be posted on the PSX Book (and/or routed if it has been designated as Routable).

During Market Hours, the price at which a Price to Display Order is displayed and ranked on the PSX Book will be its entered limit price if the Price to Display Order was not repriced upon entry, or the adjusted price if the Price to Comply Order was repriced upon entry, such that the price will not lock or cross a Protected Quotation.

During Pre-Market Hours and Post-Market Hours, a Price to Display Order will be displayed and ranked at its entered limit price without adjustment.

(B) If a Price to Display Order is entered through RASH or FIX, during Market Hours the Price to Display Order may be adjusted in the following manner after initial entry and posting to the PSX Book (unless the Order is assigned a Routing Order Attribute that would cause it to be routed to another market center rather than remaining on the PSX Book):

• If the entered limit price of the Price to Display Order locked or crossed a Protected Quotation and the NBBO changes, the price of the Order will be adjusted repeatedly in accordance with changes to the NBBO; provided, however, that if the quotation of another market center moves in a manner that would lock or cross the price of a Price to Display Order, the price of the Price to Display Order will not be adjusted. For example, if a Price to Display Order to buy at $11.02 would cross a Protected Offer of $11, the Order will be displayed and ranked at $10.99. If the Best Offer then moves to $11.01, the displayed/ranked price will be changed to $11. However, if another market center then displays an offer of $11 (thereby locking the previously displayed price of the Price to Display Order, notwithstanding Rule 610(d) under Regulation NMS), the price of the Price to Display Order will not be changed. The Order may be repriced repeatedly until such time as the Price to Display Order is able to be displayed and ranked at its original entered limit price ($11.02 in the example). The Price to Display Order receives a new timestamp each time its price is changed.
  
• If the original entered limit price of the Price to Display Order would no longer lock or cross a Protected Quotation, the Price to Display Order will be displayed and ranked at that price and will receive a new timestamp, and will not thereafter be adjusted under this paragraph (B).
  

If a Price to Display Order is entered through OUCH or FLITE, during Market Hours the Price to Display Order may be adjusted in the following manner after initial entry and posting to the PSX Book:

• If the entered limit price of the Price to Display Order locked or crossed a Protected Quotation and the NBBO changes so that the Price to Display Order could be ranked and displayed at a price at or closer to its original entered limit price without locking or crossing a Protected Quotation, the Price to Display Order may either remain on the PSX Book unchanged or may be cancelled back to the Participant, depending on the Participant's choice. For example, if a Price to Display Order to buy at $11.02 would cross a Protected Offer of $11, the Order will be ranked and displayed at $10.99. If the Best Offer changes to $11.01, the Price to Display Order will not be repriced, but rather will either remain at its current price or be cancelled back to the Participant, depending on its choice. A Participant's choice with regard to maintaining the Price to Display Order or cancelling it is set in advance for each port through which the Participant enters Orders.
  

(C) The following Order Attributes may be assigned to a Price to Display Order:

• Price. As described above, the price of the Order may be adjusted to avoid locking or crossing a Protected Quotation.
  
• Size.
  
• Reserve Size (available through OUCH, RASH and FIX only).
  
• A Time-in-Force other than IOC. (A Price to Display Order entered with a Time-in-Force of IOC would be processed as a Non-Displayed Order with a Time-in-Force of IOC).
  
• Designation as an ISO. In accordance with Regulation NMS, a Price to Display Order designated as an ISO would be processed at its entered limit price, since such a designation reflects a representation by the Participant that it has simultaneously routed one or more additional limit orders, as necessary, to execute against the full displayed size of any Protected Quotations that the Price to Display Order would lock or cross.
  
• Routing (available through RASH and FIX only).
  
• Primary Pegging and Market Pegging (available through OUCH, RASH and FIX only).
  
• Discretion (available through OUCH, RASH and FIX only).
  
• Attribution. All Price to Display Orders are Attributable Orders.
  
• Display. A Price to Display Order is always displayed (but may also have Reserve Size).
  

(3)

(A) A "Non-Displayed Order" is an Order Type that is not displayed to other Participants, but nevertheless remains available for potential execution against incoming Orders until executed in full or cancelled. In addition to the Non-Displayed Order Type, there are other Order Types that are not displayed on the PSX Book. Thus, "Non-Display" is both a specific Order Type and an Order Attribute of certain other Order Types.

When a Non-Displayed Order is entered, the Non-Displayed Order will be executed against previously posted Orders on the PSX Book that are priced equal to or better than the price of the Non-Displayed Order, up to the full amount of such previously posted Orders, unless such executions would trade through a Protected Quotation. Any portion of the Non-Displayed Order that cannot be executed in this manner will be posted to the PSX Book (unless the Non-Displayed Order has a Time-in-Force of IOC) and/or routed if it has been designated as Routable.

During Market Hours, the price at which a Non-Displayed Order is posted is determined in the following manner. If the entered limit price of the Non-Displayed Order would lock a Protected Quotation, the Non-Displayed Order will be placed on the PSX Book at the locking price. If the Non-Displayed Order would cross a Protected Quotation, the Non-Displayed Order will be repriced to a price that would lock the Protected Quotation and will be placed on the PSX Book at that price. For example, if a Non-Displayed Order to buy at $11 would cross a Protected Offer of $10.99, the Non-Displayed Order will be repriced and posted at $10.99. A Non-Displayed Order to buy at $10.99 would also be posted at $10.99. 

During Pre-Market Hours and Post-Market Hours, a Non-Displayed Order will be posted at its entered limit price without adjustment.

(B) If a Non-Displayed Order is entered through RASH or FIX, during Market Hours the Non-Displayed Order may be adjusted in the following manner after initial entry and posting to the PSX Book (unless the Order is assigned a Routing Order Attribute that would cause it to be routed to another market center rather than remaining on the PSX Book):

• If the original entered limit price of a Non-Displayed Order is higher than the Best Offer (for an Order to buy) or lower than the Best Bid (for an Order to sell) and the NBBO moves toward the original entered limit price of the Non-Displayed Order, the price of the Non-Displayed Order will be adjusted repeatedly in accordance with changes to the NBBO. For example, if a Non-Displayed Order to buy at $11.02 would cross a Protected Offer of $11, the Non-Displayed Order will be priced and posted at $11. If the Best Offer then changes to $11.01, the price of the Non-Displayed Order will be changed to $11.01. The Order may be repriced repeatedly in this manner, receiving a new timestamp each time its price is changed, until the Non-Displayed Order is posted at its original entered limit price. The Non-Displayed Order will not thereafter be repriced under this paragraph (B), except as provided below with respect to crossing a Protected Quotation.
  
• If, after being posted to the PSX Book, the NBBO changes so that the Non-Displayed Order would cross a Protected Quotation, the Non-Displayed Order will be repriced at a price that would lock the new NBBO and receive a new timestamp. For example, if a Non-Displayed Order to buy at $11 would lock a Protected Offer of $11, the Non-Displayed Order will be posted at $11. If the Best Offer then changes to $10.99, the Non-Displayed Order will be repriced at $10.99, receiving a new timestamp. The Non-Displayed Order may be repriced and receive a new timestamp repeatedly.
  

If a Non-Displayed Order is entered through OUCH or FLITE, during Market Hours the Non-Displayed Order may be adjusted in the following manner after initial entry and posting to the PSX Book:

• If the original entered limit price of the Non-Displayed Order locked or crossed a Protected Quotation and the NBBO changes so that the Non-Displayed Order could be posted at a price at or closer to its original entered limit price without crossing a Protected Quotation, the Non-Displayed Order may either remain on the PSX Book unchanged or may be cancelled back to the Participant, depending on its choice. For example, if a Non-Displayed Order to buy at $11.02 would cross a Protected Offer of $11, the Order will be priced at $11. If the Best Offer changes to $11.01, the Order will not be repriced, but rather will either remain at its current $11 price or be cancelled back to the Participant, depending on its choice. A Participant's choice with regard to maintaining the Non-Displayed Order or cancelling it is set in advance for each port through which the Participant enters Orders.
  
• If, after a Non-Displayed Order is posted to the PSX Book, the NBBO changes so that the Non-Displayed Order would cross a Protected Quotation, the Non-Displayed Order will be cancelled back to the Participant. For example, if a Non-Displayed Order to buy at $11 would lock a Protected Offer of $11, the Non-Displayed Order will be posted at $11. If the Best Offer then changes to $10.99, the Non-Displayed Order will be cancelled back to the Participant. 
  

(C) The following Order Attributes may be assigned to a Non-Displayed Order:

• Price. As described above, the price of the Order may be adjusted to avoid crossing a Protected Quotation.

• Size.

• Minimum Quantity.

• Time-in-Force.

• Designation as an ISO. In accordance with Regulation NMS, a Non-Displayed Order designated as an ISO would be processed at its entered limit price, since such a designation reflects a representation by the Participant that it has simultaneously routed one or more additional limit orders, as necessary, to execute against the full displayed size of any Protected Quotations that the Non-Displayed Order would cross. As discussed above, a Non-Displayed Order would be accepted at a price that locked a Protected Quotation, even if the Order was not designated as an ISO, because the non-displayed nature of the Order allows it to lock a Protected Quotation under Regulation NMS. Accordingly, the System would not interpret receipt of a Non-Displayed Order marked ISO that locked a Protected Quotation as the basis for determining that the Protected Quotation had been executed for purposes of accepting additional Orders at that price level.

• Routing (available through RASH and FIX only).

• Primary Pegging and Market Pegging (available through OUCH, RASH and FIX only).

• Pegging to the Midpoint (see Equity 4, Rule 3301B(d) with respect to differences in behavior that occurs in various scenarios involving Non-Displayed Orders with Midpoint Pegging).

• Discretion (available through OUCH, RASH and FIX only).

• Trade Now (available through OUCH, RASH, FLITE and FIX).

(4)

(A) A "Post-Only Order" is an Order Type designed to have its price adjusted as needed to post to the PSX Book in compliance with Rule 610(d) under Regulation NMS by avoiding the display of quotations that lock or cross any Protected Quotation in a System Security during Market Hours, or to execute against locking or crossing quotations in circumstances where economically beneficial to the Participant entering the Post-Only Order.

During Market Hours, a Post-Only Order is evaluated at the time of entry with respect to locking or crossing other Orders on the PSX Book, Protected Quotations, and potential execution as follows:

• If a Post-Only Order would lock or cross a Protected Quotation, the Post Only Order may either be adjusted or be cancelled back to the Participant, depending on the Participant's choice; provided, however, the Post-Only Order will execute if (i) it is priced below $1.00 and the value of price improvement associated with executing against an Order on the PSX Book (as measured against the original limit price of the Order) equals or exceeds the sum of fees charged for such execution and the value of any rebate that would be provided if the Order posted to the PSX Book and subsequently provided liquidity, or (ii) it is priced at $1.00 or more and the value of price improvement associated with executing against an Order on the PSX Book (as measured against the original limit price of the Order) equals or exceeds $0.01 per share. If the Participant elects to have the Post Only Order adjusted, the price of the Order will first be adjusted. If the Order is Attributable, its adjusted price will be one minimum price increment lower than the current Best Offer (for bids) or higher than the current Best Bid (for offers). If the Order is not Attributable, its adjusted price will be equal to the current Best Offer (for bids) or the current Best Bid (for offers). However, the Order will not post or execute until the Order, as adjusted, is evaluated with respect to Orders on the PSX Book.

º If the adjusted price of the Post-Only Order would not lock or cross an Order on the PSX Book, the Order will be posted in the same manner as a Price to Comply Order (if it is not Attributable) or a Price to Display Order (if it is Attributable). Specifically, if the Post-Only Order is not Attributable, it will be displayed on the PSX Book at a price one minimum price increment lower than the current Best Offer (for bids) or higher than the current Best Bid (for offers) but will be ranked on the PSX Book with a non-displayed price equal to the current Best Offer (for bids) or to the current Best Bid (for offers). For example, if a Post-Only Order to buy at $11 would lock a Protected Offer of $11, the Order will be ranked at a non-displayed price of $11 but will be displayed at $10.99. If the Post-Only Order is Attributable, it will be ranked and displayed on the PSX Book at a price one minimum increment lower than the current Best Offer (for bids) or higher than the current Best Bid (for offers). Thus, in the preceding example, the Post-Only Order to buy would be ranked and displayed at $10.99.

º If the adjusted price of the Post-Only Order would lock or cross a Displayed Order at its displayed price on the PSX Book, the Post Only Order may either be adjusted or be cancelled back to the Participant, depending on the Participant's choice; provided, however, the Post-Only Order will execute if (i) it is priced below $1.00 and the value of price improvement associated with executing against an Order on the PSX Book (as measured against the original limit price of the Order) equals or exceeds the sum of fees charged for such execution and the value of any rebate that would be provided if the Order posted to the PSX Book and subsequently provided liquidity, or (ii) it is priced at $1.00 or more and the value of price improvement associated with executing against an Order on the PSX Book (as measured against the original limit price of the Order) equals or exceeds $0.01 per share. If the Participant elects to have the Post-Only Order adjusted, the Post-Only Order will be repriced, ranked, and displayed at one minimum price increment below the current best displayed price to sell on the PSX Book (for bids) or above the current best displayed price to buy on the PSX Book (for offers); provided, however, the Post-Only Order will execute if it meets the criteria above. For example, if a Participant entered a Non-Attributable Post-Only Order to buy at $11.01, another market center is displaying a Protected Offer at $11, and there is an Order on the PSX Book to sell at $11, the adjusted price of the Post-Only Order will be $11. However, because the Post-Only Order would be executable against the Order on the PSX Book and would receive $0.01 price improvement (as measured against the original $11.01 price of the Post-Only Order), the Post-Only Order would execute.

• If the adjusted price of the Post-Only Order would lock or cross a non-displayed price on the PSX Book, the Post-Only Order will be posted in the same manner as a Price to Comply Order; provided, however, the Post-Only Order will execute if (i) it is priced below $1.00 and the value of price improvement associated with executing against an Order on the PSX Book (as measured against the original limit price of the Order) equals or exceeds the sum of fees charged for such execution and the value of any rebate that would be provided if the Order posted to the PSX Book and subsequently provided liquidity, or (ii) it is priced at $1.00 or more and the value of price improvement associated with executing against an Order on the PSX Book (as measured against the original limit price of the Order) equals or exceeds $0.01 per share. For example, if a Participant entered a Non-Attributable Post-Only Order to buy at $11.01, another market center is displaying a Protected Offer at $11, and there is a Non-Displayed Order on the PSX Book to sell at $11, the adjusted price of the Post-Only Order will be $11. However, because the Post-Only Order would be executable against the Non-Displayed Order on the PSX Book and would receive $0.01 price improvement (as measured against the original $11.01 price of the Post-Only Order), the Post-Only Order would execute.

• If the Post-Only Order would not lock or cross a Protected Quotation but would lock or cross a Displayed Order at its displayed price on the PSX Book, the Post Only Order may either be adjusted or be cancelled back to the Participant, depending on the Participant's choice; provided, however, the Post-Only Order will execute if (i) it is priced below $1.00 and the value of price improvement associated with executing against an Order on the PSX Book (as measured against the original limit price of the Order) equals or exceeds the sum of fees charged for such execution and the value of any rebate that would be provided if the Order posted to the PSX Book and subsequently provided liquidity, or (ii) it is priced at $1.00 or more and the value of price improvement associated with executing against an Order on the PSX Book (as measured against the original limit price of the Order) equals or exceeds $0.01 per share. If the Participant elects to have the Post Only Order adjusted, the Post Only Order will be repriced, ranked, and displayed at one minimum price increment below the current best-priced Order to sell on the PSX Book (for bids) or above the current best-priced Order to buy on the PSX Book (for offers); provided, however, the Post-Only Order will execute if it meets the criteria above. For example, if a Participant entered a Post-Only Order to buy at $11.02, the Best Offer on an away exchange was $11.04, and there was a Displayed Order on the PSX Book to sell at $11.02, the Post-Only Order would be ranked and displayed at $11.01. However, if a Participant entered a Post-Only Order to buy at $11.03, the Order would execute against the Order on the PSX Book at $11.02, receiving $0.01 per share price improvement.

• If the Post-Only Order would not lock or cross a Protected Quotation but would lock or cross a non-displayed Order on the PSX Book, the Post-Only Order will be posted, ranked, and displayed at its limit price; provided, however, the Post-Only Order will execute if (i) it is priced below $1.00 and the value of price improvement associated with executing against an Order on the PSX Book (as measured against the original limit price of the Order) equals or exceeds the sum of fees charged for such execution and the value of any rebate that would be provided if the Order posted to the PSX Book and subsequently provided liquidity, or (ii) it is priced at $1.00 or more and the value of price improvement associated with executing against an Order on the PSX Book (as measured against the original limit price of the Order) equals or exceeds $0.01 per share. For example, if a Participant entered a Post-Only Order to buy at $11.02, the Best Offer was $11.04, and there was a Non-Displayed Order on the PSX Book to sell at $11.02, the Post-Only Order would be ranked and displayed at $11.02. However, if a Participant entered a Post-Only Order to buy at $11.03, the Order would execute against the Order on the PSX Book at $11.02, receiving $0.01 per share price improvement. 

• If a Post-Only Order is entered with a Time-in-Force of IOC, the Order will be evaluated for possible execution in the same manner as any other Post-Only Order but will be cancelled rather than posted if the Order cannot execute.

• If a Post-Only Order would not lock or cross an Order on the PSX Book or any Protected Quotation, it will be posted on the PSX Book at its entered limit price.

During Pre-Market and Post-Market Hours, a Post-Only Order will be processed in a manner identical to Market Hours with respect to locking or crossing Orders on the PSX Book, but will not be cancelled or have its price adjusted with respect to locking or crossing the quotations of other market centers.

(B) If a Post-Only Order is entered through RASH or FIX, during System Hours the Post-Only Order may be adjusted in the following manner after initial entry and posting to the PSX Book:

• If the original entered limit price of the Post-Only Order is not being displayed, the displayed price (and non-displayed price, if any) of the Order will be adjusted repeatedly in accordance with changes to the NBBO or the best price on the PSX Book, as applicable; provided, however, that if the quotation of another market center moves in a manner that would lock or cross the displayed price of a Post-Only Order, the price(s) of the Post-Only Order will not be adjusted. For example, if a Non-Attributable Post-Only Order to buy at $11.02 would cross a Protected Offer of $11, the Order will be ranked at a non-displayed price of $11 but will be displayed at $10.99. If the Best Offer then moves to $11.01, the displayed price will be changed to $11 and the non-displayed price at which the Order is ranked will be changed to $11.01. However, if another market center then displays an offer of $11 (thereby locking the previously displayed price of the Post-Only Order, notwithstanding Rule 610(d) under Regulation NMS), the price of the Post-Only Order will not be changed. The Order may be repriced repeatedly until such time as the Post-Only Order is able to be displayed at its original entered limit price ($11.02 in the example). The Post-Only Order receives a new timestamp each time its price is changed.

• If the original entered limit price of the Post-Only Order would no longer lock or cross a Protected Quotation or a Displayed Order on the PSX Book, the Post-Only Order will be ranked and displayed at that price and will receive a new time-stamp, and will not thereafter be adjusted under this paragraph (B).

If a Post-Only Order is entered through OUCH or FLITE, the Post-Only Order may be adjusted in the following manner after initial entry and posting to the PSX Book:

• During Market Hours, if the original entered limit price of the Post-Only Order locked or crossed a Protected Quotation, the Post-Only Order may be adjusted after initial entry in the same manner as a Price to Comply Order (or a Price to Display Order, if it is Attributable). Thus, in the case of a Non-Attributable Post-Only Order that crossed a Protected Quotation, if the NBBO changed so that the Post-Only Order could be ranked and displayed at a price at or closer to its original entered limit price without locking or crossing a Protected Quotation, the Post-Only Order may either remain on the PSX Book unchanged or may be cancelled back to the Participant, depending on its choice. In the case of a Non-Attributable Post-Only Order that locked a Protected Quotation, if the limit price would no longer lock a Protected Quotation, the Post-Only Order may either remain on the PSX Book unchanged, may be cancelled back to the Participant, or may be ranked and displayed at its original entered limit price, depending on the Participant's choice, and will not thereafter be adjusted under this paragraph (B). If the Post-Only Order is displayed at its original entered limit price, it will receive a new timestamp. Finally, in the case of an Attributable Post-Only Order that locked or crossed a Protected Quotation, if the NBBO changed so that the Post-Only Order could be ranked and displayed at a price at or closer to its original entered limit price without locking or crossing a Protected Quotation, the Post-Only Order may either remain on the PSX Book unchanged or may be cancelled back to the Participant, depending on the Participant's choice. A Participant's choice with regard to adjustment of Post-Only Orders is set in advance for each port through which the Participant enters Orders.

• During System Hours, if the original entered limit price of the Post-Only Order locked or crossed a Displayed Order on the PSX Book and the PSX Book changes so that the original entered limit price would no longer lock or cross an Order on the PSX Book, the Post-Only Order may either remain on the PSX Book unchanged or may be cancelled back to the Participant, depending on the Participant's choice. For example, if a Post-Only Order to buy at $11 would lock a Displayed Order on the PSX Book priced at $11, the Post-Only Order will be ranked and displayed at $10.99. If the Order at $11 is cancelled or executed, the Post-Only Order may either remain with a displayed price of $10.99 or be cancelled back to the Participant, depending on the Participant's choice. A Participant's choice with regard to maintaining the Post-Only Order or cancelling it is set in advance for each port through which the Participant enters Orders.

(C) The following Order Attributes may be assigned to a Post-Only Order:

• Price. As described above, the price of the Order may be adjusted to avoid locking or crossing a Protected Quotation, and may include a displayed price as well as a non-displayed price.

• Size.

• Time-in-Force; provided, however, that a Post-Only Order with a Time-in-Force of IOC may not be entered through RASH or FIX.

• Designation as an ISO. In accordance with Regulation NMS, a Post-Only Order designated as an ISO that locked or crossed a Protected Quotation would be processed at its entered limit price, since such a designation reflects a representation by the Participant that it has simultaneously routed one or more additional limit orders, as necessary, to execute against the full displayed size of any Protected Quotations that the Post-Only Order would lock or cross. However, as described above, a Post-Only Order designated as an ISO that locked or crossed an Order on the PSX Book would either execute at time of entry, post at its limit price, or would have its price adjusted prior to posting. Accordingly, the System would not interpret receipt of a Post-Only Order marked ISO that had its price adjusted prior to posting as the basis for determining that any Protected Quotation at the Order's original entered limit price level had been executed for purposes of accepting additional Orders at that price level. However, if the Post-Only Order is ranked and displayed at its adjusted price, the System would consider the adjusted price level to be open for purposes of accepting additional Orders at that price level. For example, assume that there is a Protected Offer at $11 and a Participant enters a Post-Only Order marked ISO to buy at $11. If there are no Orders to sell at $11 on the PSX Book, the Order to buy will be displayed and ranked at $11, since the designation of the Order as an ISO reflects the Participant's representation that it has routed one or more additional limit orders, as necessary, to execute against the full displayed size of any Protected Quotations that the Post-Only Order would lock or cross. However, if there was also a Displayed Order to sell at $11 on the PSX Book, the Post-Only Order will be repriced, ranked, and displayed at $10.99. In that case, the mere fact that the Post-Only Order was designated as an ISO would not allow PSX to conclude that the $11 price level was "open" for receiving orders to buy at that price; the $11 price level would be considered open only if market data received by the System demonstrated that the Protected Offer at $11 had been removed or if a subsequent Displayed Order marked ISO was received and ranked at that price. 

• Attribution.

• Display. A Post-Only Order is always displayed, although as provided above, may also have a non-displayed price.

• Trade Now (available through OUCH, RASH, FLITE and FIX).

(5)

(A) A "Market Maker Peg Order" is an Order Type designed to allow a Market Maker to maintain a continuous two-sided quotation at a displayed price that is compliant with the quotation requirements for Market Makers set forth in Rule 3213(a)(2). The displayed price of the Market Maker Peg Order is set with reference to a "Reference Price" in order to keep the displayed price of the Market Maker Peg Order within a bounded price range. A Market Maker Peg Order may be entered through OUCH, RASH or FIX only. A Market Maker Peg Order must be entered with a limit price beyond which the Order may not be priced. The Reference Price for a Market Maker Peg Order to buy (sell) is the then-current National Best Bid (National Best Offer) (including PSX), or if no such National Best Bid or National Best Offer, the most recent reported last-sale eligible trade from the responsible single plan processor for that day, or if none, the previous closing price of the security as adjusted to reflect any corporate actions (e.g., dividends or stock splits) in the security.

Upon entry, the displayed price of a Market Maker Peg Order to buy (sell) is automatically set by the System at the Designated Percentage (as defined in Equity 2, Section 5) away from the Reference Price in order to comply with the quotation requirements for Market Makers set forth in Equity 2, Section 5(a)(2). For example, if the National Best Bid is $10 and the Designated Percentage for the security is 8%, the displayed price of a Market Marker Peg Order to buy would be $9.20. If the limit price of the Order is not within the Designated Percentage, the Order will be sent back to the Participant.

Once a Market Maker Peg Order has posted to the PSX Book, it is repriced if needed as the Reference Price changes. Specifically, if as a result of a change to the Reference Price, the difference between the displayed price of the Market Maker Peg Order and the Reference Price exceeds the Defined Limit (as defined in Equity 2, Section 5), a Market Maker Peg Order to buy (sell) will be repriced to the Designated Percentage away from the Reference Price. In the foregoing example, if the Defined Limit is 9.5% and the National Best Bid increased to $10.17, such that the displayed price of the Market Maker Peg Order would be more than 9.5% away, the Order will be repriced to $9.36, or 8% away from the National Best Bid. Note that prices will be rounded in a manner to ensure that they are calculated and displayed at a level that is consistent with the Designated Percentage and the permissible minimum increment of $0.01 or $0.0001, as applicable. If the limit price of the Order is not within the Designated Percentage, the Order will be sent back to the Participant.

Similarly, if as a result of a change to the Reference Price, the displayed price of a Market Maker Peg Order to buy (sell) is at least one minimum price variation more than (less than) a price that is 4% less than (more than) the Reference Price, rounded up (down), then the Market Maker Peg Order to buy (sell) will be repriced to the Designated Percentage away from the Reference Price. For example, if the National Best Bid is $10 and the Designated Percentage for the security is 8%, the displayed price of a Market Marker Peg Order to buy would initially be $9.20. If the National Best Bid then moved to $9.57, such that the displayed price of the Market Maker Peg Order would be a minimum of $0.01 more than a price that is 4% less than the National Best Bid, rounded up (i.e. $9.57 - ($9.57 x 0.04) = $9.1872, rounding up to $9.19), the Order will be repriced to $8.81, or 8% away from the National Best Bid.

Market Maker Peg Orders entered with a pegging offset will not be accepted.

A new timestamp is created for a Market Maker Peg Order each time that it is repriced. In the absence of a Reference Price, a Market Maker Peg Order will be cancelled (if on the PSX Book) or rejected (if it is an incoming Order). If, after entry, a Market Maker Peg Order has a displayed price based on a Reference Price other than the NBBO and such Market Maker Peg Order is established as the National Best Bid or National Best Offer, the Market Maker Peg Order will not be subsequently repriced in accordance with this rule until a new Reference Price is established. Additionally, if after entry, a Market Maker Peg Order of round lot size has a displayed price based on the NBBO, and the NBBO subsequently shifts such that the displayed price of the Market Maker Peg Order to buy (sell) is equal to or greater (less) than the National Best Bid (National Best Offer), the Market Maker Peg Order will not be subsequently repriced in accordance with this Rule until a new Reference Price is established that is more aggressive than the displayed price of the Market Maker Peg Order. In such cases, the new Reference Price may be established by a change in the NBBO based on another market center's quotation or by the entry into the System of any Displayed Order with a price better than the displayed price of the Market Maker Peg Order, whether the new Order is at a price that is lower than, higher than or equal to the prior Reference Price. 

Notwithstanding the availability of Market Maker Peg Order functionality, a Market Maker remains responsible for entering, monitoring, and resubmitting, as applicable, quotations that meet the requirements of Rule 3213.

(B) The following Order Attributes may be assigned to a Market Maker Peg Order:

• Price. As discussed above, the displayed price of a Market Maker Peg Order is established by PSX based on the Reference Price, the Designated Percentage, the Defined Limit, and the 4% minimum difference from the Reference Price.

• Size.

• A Time-in-Force other than IOC or GTC. 

• Attribution. All Market Maker Peg Orders are Attributable.

• Display. Market Marker Peg Orders are always Displayed.

(6)

(A) A "Midpoint Peg Post-Only Order" is an Order Type with a Non-Display Order Attribute that is priced at the midpoint between the NBBO and that will execute upon entry only in circumstances where economically beneficial to the party entering the Order. The Midpoint Peg Post-Only Order is available during the Regular Market Session only. As described below, a Midpoint Peg Post Only Order may be “Fixed” or “Managed.”

A Midpoint Peg Post-Only Order must be assigned a limit price. When a Midpoint Peg Post-Only Order is entered, it will be priced at the midpoint between the NBBO, unless such midpoint is higher than (lower than) the limit price of an Order to buy (sell), in which case the Order will be priced at its limit price. If the NBBO is locked, the Midpoint Peg Post-Only Order will be priced at the locking price, if the NBBO is crossed or if there is no NBBO, the Order will not be accepted. The Midpoint Peg Post-Only Order will post to the System book unless it is a buy (sell) Order that is priced higher than (lower than) a sell (buy) Order on the System book, in which case it will execute at the price of the Order on the System book; provided, however, that if the Order has a Time-in-Force of IOC, the Order will be cancelled after determining whether it can be executed. For example, if the Best Bid was $11 and the Best Offer was $11.06, the price of the Midpoint Peg Post-Only Order would be $11.03. If there was a Non-Displayed Order (or another Order with a Non-Display Order Attribute) on the System book to sell at $11.02, the incoming Midpoint Peg Post-Only Order to buy would execute against it at $11.02. However, if there was a Non-Displayed Order (or another Order with a Non-Display Order Attribute) to sell at $11.03, the Midpoint Peg Post-Only Order to buy would post at $11.03. While a Midpoint Peg Post-Only Order that posts to the System book is locking a preexisting Order at its displayed price, the Midpoint Peg Post-Only Order will execute against an incoming Order only if the price of the incoming sell (buy) Order is lower (higher) than the displayed price of the preexisting Order. Thus, in the previous example, if the NBBO is locked at $11.03 and a Midpoint Peg Post-Only Order to buy at $11.03 locks a displayed Order to sell at $11.03, the Midpoint Peg Post-Only Order could execute only against an incoming Order to sell priced at less than $11.03.

A Midpoint Peg Post-Only Order that would be assigned a price of $1 or less per share will not be accepted.

(B) A Managed Midpoint Peg Post-Only Order may be repriced in the following manner after initial entry and posting to the System book:

• The price of the Midpoint Peg Post-Only Order will be updated repeatedly to equal the midpoint between the NBBO; provided, however, that the Order will not be priced higher (lower) than the limit price of an Order to buy (sell). In the event that the midpoint between the NBBO becomes higher than (lower than) the limit price of an Order to buy (sell), the price of the Order will stop updating and the Order will post (with a Non-Display Order Attribute) at its limit price, but will resume updating if the midpoint becomes lower than (higher than) the limit price of an Order to buy (sell). Similarly, if a Midpoint Peg Post-Only Order is on the System book and subsequently the NBBO is crossed, or if there is no NBBO, the Order will be removed from the System Book and will be re-entered at the new midpoint once there is a valid NBBO that is not crossed. The Midpoint Peg Post-Only Order receives a new timestamp each time its price is changed.

A Fixed Midpoint Peg Post-Only Order may be repriced in the following manner after initial entry and posting to the System book:

• The price at which the Midpoint Peg Post-Only Order is ranked on the System book is the midpoint between the NBBO, unless the Order has a limit price that is lower than the midpoint between the NBBO for an Order to buy (higher than the midpoint between the NBBO for an Order to sell), in which case the Order will be ranked on the System book at its limit price. The price of the Order will not thereafter be repriced based on changes to the NBBO. However, a Fixed Midpoint Peg Post-Only Order will be cancelled back to the Participant after initial entry and posting to the Exchange Book if any of the following conditions are met:

• There is no National Best Bid and/or National Best Offer; 

• The Order to buy (sell) is entered with a limit price above (below) the Midpoint of the NBBO and is ranked at the Midpoint of the NBBO; thereafter, the NBBO changes so that the midpoint changes and the Order is no longer at the NBBO Midpoint;

• The Order to buy (sell) is entered at a limit price that is equal to or less than (greater than) the Midpoint of the NBBO and is ranked at its limit price; thereafter, the NBBO changes so that the Midpoint of the NBBO is lower (higher) than the limit price of the Order; 

• The Order to buy (sell) is entered at a limit price that is equal to or less than (greater than) the Midpoint of the NBBO and is ranked at its limit price, thereafter the NBBO becomes crossed, such that the Midpoint of the crossed NBBO remains equal to or higher (lower) than the limit price of the Order, and then a new sell (buy) Order is received at a price that locks or crosses the limit price of the resting Midpoint Peg Post-Only Order; or

• The Order to buy (sell) is entered at a limit price that is greater than (less than) the Midpoint of the NBBO and is therefore ranked at the Midpoint of the NBBO, thereafter the NBBO becomes crossed but the Midpoint does not change, and then a new sell (buy) Order is received at a price that locks or crosses the Midpoint of the NBBO.

(C) The following Order Attributes may be assigned to a Midpoint Peg Post-Only Order:

• Price of more than $1 per share.

• Size.

• Time-in-Force; provided, however, that a Midpoint Peg Post-Only Order with a Time-in-Force of IOC may not be entered through RASH or FIX, and provided further, that regardless of the Time-in-Force entered, a Midpoint Post-Only Order may not be active outside of the Regular Market Session. A Midpoint Peg Post- Only Order entered prior to the beginning of the Regular Market Session will be rejected. A Midpoint Peg Post-Only Order remaining on the System book at 4:00 p.m. ET will be cancelled by the System.

• Pegging to the midpoint is required for Managed Midpoint Peg Post-Only Orders. As discussed above, the price of a Fixed Midpoint Peg Post- Only Order will be pegged to the midpoint upon entry and not repriced thereafter.

• Minimum Quantity.

• Non-Display. All Midpoint Peg Post-Only Orders are Non-Displayed.

• Trade Now (available through OUCH, RASH, FLITE and FIX).

Adopted Jan. 22, 2021 (SR-Phlx-2021-04); amended July 2, 2021 (SR-Phlx-2021-40), operative September 17, 2021; amended Sep. 9, 2022 (SR-Phlx-2022-35), operative Oct. 10, 2022; amended Sep. 5, 2023 (SR-Phlx-2023-43), operative Oct. 4, 2023.

As described in Equity 4, Rule 3301A, the following Order Attributes may be assigned to those Order Types for which they are available.

(a) Time-in-Force

The "Time-in-Force" assigned to an Order means the period of time that PSX will hold the Order for potential execution. Participants specify an Order's Time-in-Force by designating a time at which the Order will become active and a time at which the Order will cease to be active. The available times for activating Orders are:

• The time of the Order's receipt by PSX; 

• the beginning of Market Hours;

• the end of Market Hours;

• the resumption of trading, in the case of a security that is the subject of a trading halt.

The available times for deactivating Orders are:

• "Immediate" (i.e., immediately after determining whether the Order is marketable);

• the end of Market Hours;

• the end of System Hours;

• one year after entry; or

• a specific time identified by the Participant; provided, however, that an Order specifying an expire time beyond the current trading day will be cancelled at the end of the current trading day.

Notwithstanding the Time-in-Force originally designated for an Order, a Participant may always cancel an Order after it is entered.

The following Times-in-Force are referenced elsewhere in PSX's Rules by the designations noted below:

(1) An Order that is designated to deactivate immediately after determining whether the Order is marketable may be referred to as having a Time in Force of "Immediate or Cancel" or "IOC". An Order with a Time-in-Force of IOC that is entered at any time between 8:00 a.m. ET and 5:00 p.m. ET may be referred to as having a Time-in-Force of "System Hours Immediate or Cancel" or "SIOC".

(2) An Order that is designated to deactivate at 8:00 p.m. may be referred to as having a Time in Force of "System Hours Day" or "SDAY".

(3) An Order that is designated to deactivate one year after entry may be referred to as a "Good-till-Cancelled" or "GTC" Order. If a GTC Order is designated as eligible for execution during Market Hours only, it may be referred to as having a Time in Force of "Market Hours Good-till-Cancelled" or "MGTC". If a GTC is designated as eligible for execution during System Hours, it may be referred to as having a Time in Force of "System Hours Good-till-Cancelled" or "SGTC".

(4) An Order that is designated to deactivate at the time specified in advance by the entering Participant may be referred to as having a Time-in-Force of "System Hours Expire Time" or "SHEX".

(5) An Order that is designated to activate at any time during Market Hours and deactivate at 4:00 p.m. ET may be referred to as having a Time-in-Force of "Market Hours Day" or "MDAY". An Order entered with a Time-in-Force of MDAY after 4:00 p.m. ET will be accepted but given a Time-in-Force of IOC.

(6) An Order that is designated to activate when entered and deactivate at 4:00 p.m. ET may be referred to as having a Time-in-Force of "Good-till-Market Close" or "GTMC". GTMC Orders entered after 4:00 p.m. ET will not be accepted.

(b) Size. Except as otherwise provided, an Order may be entered in any whole share size between one share and 999,999 shares. Orders for fractional shares are not permitted. The following terms may be used to describe particular Order sizes:

(1) "normal unit of trading" or "round lot" means the size generally employed by traders when trading a particular security, which is 100 shares in most instances;

(2) "mixed lot" means a size of more than one normal unit of trading but not a multiple thereof; and

(3) "odd lot" means a size of less than one normal unit of trading.

(c) Price. With limited exceptions, all Orders must have a price, such that they will execute only if the price available is equal to or better than the price of the Order. The maximum price that the System will accept is $199,999.99. Certain Orders have a price that is determined by PSX based on the NBBO or other reference prices, rather than by the Participant. As described below with respect to the Pegging Order Attribute, an Order may have a price that is pegged to the opposite side of the market, in which case the Order will behave like a "market order" or "unpriced order" (i.e., an Order that executes against accessible liquidity on the opposite side of the market, regardless of its price).

(d) Pegging. Pegging is an Order Attribute that allows an Order to have its price automatically set with reference to the NBBO; provided, however, that if PSX is the sole market center at the Best Bid or Best Offer (as applicable), then the price of any Displayed Order with Primary Pegging (as defined below) will be set with reference to the highest bid or lowest offer disseminated by a market center other than PSX. An Order with a Pegging Order Attribute may be referred to as a "Pegged Order." For purposes of this rule, the price to which an Order is pegged will be referred to as the Inside Quotation, the Inside Bid, or the Inside Offer, as appropriate. There are three varieties of Pegging:

• Primary Pegging means Pegging with reference to the Inside Quotation on the same side of the market. For example, if the Inside Bid was $11, an Order to buy with Primary Pegging would be priced at $11.

• Market Pegging means Pegging with reference to the Inside Quotation on the opposite side of the market. For example, if the Inside Offer was $11.06, an Order to buy with Market Pegging would be priced at $11.06.

• Midpoint Pegging means Pegging with reference to the midpoint between the Inside Bid and the Inside Offer (the "Midpoint"). Thus, if the Inside Bid was $11 and the Inside Offer was $11.06, an Order with Midpoint Pegging would be priced at $11.03. An Order with Midpoint Pegging is not displayed. An Order with Midpoint Pegging may be executed in sub-pennies if necessary to obtain a midpoint price. Participants may specify two alternative forms of Midpoint Pegging when entering an Order: “Managed Midpoint” Orders, which the System may update in response to changes to the Midpoint; and “Fixed Midpoint” Orders, which the System will cancel in response to changes to the Midpoint, as set forth below.

Pegging is available only during Market Hours. An Order with Pegging may specify a limit price beyond which the Order may not be executed; provided, however, that if an Order has been assigned a Pegging Order Attribute and a Discretion Order Attribute, the Order may execute at any price within the discretionary price range, even if beyond the limit price specified with respect to the Pegging Order Attribute. If an Order with Pegging is priced at its limit price, the price of the Order may nevertheless be changed to a less aggressive price based on changes to the Inside Quotation. In addition, an Order with Primary Pegging or Market Pegging may specify an Offset Amount, such that the price of the Order will vary from the Inside Quotation by the selected Offset Amount. The Offset Amount may be either aggressive or passive. Thus, for example, if a Participant entered an Order to buy with Primary Pegging and a passive Offset Amount of $0.05 and the Inside Bid was $11, the Order would be priced at $10.95. If the Participant selected an aggressive Offset Amount of $0.02, however, the Order would be priced at $11.02. An Order with Primary Pegging and an Offset Amount will not be Displayed, unless the Order is Attributable. An Order with Midpoint Pegging will not be Displayed. An Order with Market Pegging and no Offset behaves as a "market order" with respect to any liquidity on the PSX Book at the Inside Quotation on the opposite side of the market because it is immediately executable at that price.

Primary Pegged, Market Pegged, and Managed Midpoint Orders (collectively, “Peg Managed Orders”) are available through OUCH, RASH, and FIX only.

If, at the time of entry, there is no price to which a Peg Managed Order, that has not been assigned a Routing Order Attribute or a Time in Force of IOC, can be pegged or pegging would lead to a price at which the Order cannot be posted, or in the case of a Managed Midpoint Order, the Inside Bid and Inside Offer are crossed, the Order will not be immediately available on the Exchange Book and will be entered once there is a permissible price; provided, however, that the System will cancel the Pegged Order if no permissible pegging price becomes available within one second after Order entry (the Exchange may, in the exercise of its discretion, modify the length of this one second time period by posting advance notice of the applicable time period on its website).

For a Peg Managed Order that has been assigned a Routing Order Attribute, if there is no permissible price to which the Order can be pegged at the time of entry, pegging would lead to a price at which the Order cannot be posted, or in the case of a Managed Midpoint Order, the Inside Bid and Inside Offer are crossed, the Order will be rejected; provided, however, that a Displayed Order that has Market Pegging, or an Order with a Non-Display Attribute that has Primary Pegging or Market Pegging, will be accepted at its limit price.

A Midpoint Pegging Order will have its price set upon initial entry to the Midpoint, unless the Order has a limit price, and that limit price is lower than the Midpoint for an Order to buy (higher than the Midpoint for an Order to sell), in which case the Order will be ranked on the PSX Book at its limit price.  If the Inside Bid and Inside Offer are locked, a Midpoint Pegging Order will be priced at the locking price; and for Fixed Midpoint Orders, if the Inside Bid and Inside Offer are crossed or if there is no Inside Bid and/or Inside Offer, the Order will not be accepted.  However, even if the Inside Bid and Inside Offer are locked, an Order with Midpoint Pegging that locked an Order on the Exchange Book would execute (provided, however, that a Midpoint Peg Post-Only Order would execute or post as described in Equity 4, Rule 3301A(b)(6)(A)).

After posting to the Exchange Book, the price of a Fixed Midpoint Order will not thereafter be adjusted based on changes to the Inside Bid or Offer. However, a Fixed Midpoint Order will be cancelled back to the Participant after initial entry and posting to the Exchange Book if any of the following conditions are met:

• There is no Inside Bid and/or Inside Offer; 

• The Order to buy (sell) is entered with a limit price above (below) the Midpoint and is ranked at the Midpoint; thereafter the Inside Bid and/or Inside Offer change so that the Midpoint changes and the Order is no longer at the Midpoint; 

• The Order to buy (sell) is entered at a limit price that is equal to or less than (greater than) the Midpoint and is ranked at its limit price; thereafter, the Inside Bid and/or Inside Offer change so that the Midpoint is lower (higher) than the limit price of the Order; 

• The Order to buy (sell) is entered at a limit price that is equal to or less than (greater than) the Midpoint and is ranked at its limit price, thereafter, the Inside Bid and Inside Offer become crossed, such that the Midpoint of the crossed Quotation remains equal to or higher (lower) than the limit price of the Order, and then a new sell (buy) Order is received at a price that locks or crosses the limit price of the resting Order marked for Midpoint Pegging; or

• The Order to buy (sell) is entered at a limit price that is greater than (less than) the Midpoint and is therefore ranked at the Midpoint; thereafter, the Inside Bid and Inside Offer become crossed but the Midpoint does not change, and then a new sell (buy) Order is received at a price that locks or crosses the Midpoint of the Inside Bid and Inside Offer.

A Peg Managed Order will have its price set upon initial entry and will thereafter have its price reset in accordance with changes to the relevant Inside Quotation. An Order with Pegging receives a new timestamp whenever its price is updated and therefore will be evaluated with respect to possible execution (and routing, if it has been assigned a Routing Order Attribute) in the same manner as a newly entered Order. If the price to which an Order is pegged becomes unavailable, pegging would lead to a price at which the Order cannot be posted, or, in the case of a Managed Midpoint Order, if the Inside Bid and Inside Offer become crossed, the Order will be cancelled back to the participant if assigned a Routing Order Attribute; provided, however, that an Order with Market Pegging, or an Order with Primary Pegging and a Non-Display Attribute, shall be re-entered at its limit price. If a Peg Managed Order is not assigned a Routing Order Attribute, and the price to which it is pegged becomes unavailable, pegging would lead to a price at which the Order cannot be posted, or, in the case of a Managed Midpoint Order, if the Inside Bid and Inside Offer become crossed, the Order will be removed from the Exchange Book and will be re-entered once there is a permissible price, provided however, that the System will cancel the Pegged Order if no permissible pegging price becomes available within one second after the Order was removed and no longer available on the Exchange Book (the Exchange may, in the exercise of its discretion modify the length of this one second time period by posting advance notice of the applicable time period on its website). For an Order with Midpoint Pegging, if the Inside Bid and Inside Offer become crossed or if there is no Inside Bid and/or Inside Offer, the Order will be removed from the Exchange Book and will be re-entered at the new midpoint once there is a valid Inside Bid and Inside Offer that is not crossed; provided, however, that the System will cancel the Order with Midpoint Pegging if no permissible price becomes available within one second after the Order was removed and no longer available on the Exchange Book (the Exchange may, in the exercise of its discretion modify the length of this one second time period by posting advance notice of the applicable time period on its website).

Pegging Orders are subject to a collar. Any portion of a Pegging Order with a Routing attribute to buy (sell) that could execute, either on the Exchange or when routed to another market center, at a price of more than the greater of $0.25 or 5 percent higher (lower) than the NBO (NBB) at the time when the order reaches the System (the “Collar Price”), will be cancelled.  An Order entered without a Routing attribute will be cancelled, if it would, as a result of the price determined by a Pegging or Discretionary Pegging attribute, execute or post to the Exchange Book at a price through the Collar Price.

(e) Minimum Quantity. Minimum Quantity is an Order Attribute that allows a Participant to provide that an Order will not execute unless a specified minimum quantity of shares can be obtained. An Order with a Minimum Quantity Order Attribute may be referred to as a "Minimum Quantity Order." For example, a Participant could enter an Order with a Size of 1000 shares and specify a Minimum Quantity of 500 shares. In that case, upon entry, the System would determine whether there were one or more posted Orders executable against the incoming Order with an aggregate size of at least the minimum quantity (500 shares in the above example). If there were not, the Order would post on the PSX Book in accordance with the characteristics of its underlying Order Type. Once posted to the PSX Book, a Minimum Quantity Order retains its Minimum Quantity Order Attribute, such that the Order may execute only against incoming Orders with a size of at least the minimum quantity condition. An Order that has a Minimum Quantity Order Attribute and that posts to the PSX Book will not be displayed.

A Participant may specify two alternatives with respect to the processing of a Minimum Quantity Order at time of entry:

• First, the Participant may specify that the minimum quantity condition may be satisfied by execution against multiple Orders. In that case, upon entry, the System would determine whether there were one or more posted Orders executable against the incoming Order with an aggregate size of at least the minimum quantity (500 shares in the above example). If there were not, the Order would post on the PSX Book in accordance with the characteristics of its underlying Order Type.

• Second, the Participant may specify that the minimum quantity condition must be satisfied by execution against one or more Orders, each of which must have a size that satisfies the minimum quantity condition. If there are such Orders but there are also other Orders that do not satisfy the minimum quantity condition, the Minimum Quantity Order will execute against Orders on the PSX Book in accordance with Equity 4, Rule 3307(a) (pertaining to execution priority) until it reaches an Order that does not satisfy the minimum quantity condition, and then the remainder of the Order will be cancelled. For example, if a Participant entered an Order to buy at $11 with a size of 1,500 shares and a minimum quantity condition of 500 shares, and there were three Orders to sell at $11 on the PSX Book, two with a size of 500 shares each and one with a size of 200 shares, with the 200 share Order ranked in time priority between the 500 share Orders, the 500 share Order with the first time priority would execute and the remainder of the Minimum Quantity Order would be cancelled. Alternatively, if the Order would lock or cross Orders on the PSX Book but none of the resting Orders would satisfy the minimum quantity condition, an Order with a minimum quantity condition to buy (sell) will be repriced to one minimum price increment lower than (higher than) the lowest price (highest price) of such Orders. For example, if there was an Order to buy at $11 with a minimum quantity condition of 500 shares, and there were resting Orders on the PSX Book to sell 200 shares at $10.99 and 300 shares at $11, the Order would be repriced to $10.98 and ranked at that price.

Once posted to the PSX Book, a Minimum Quantity Order retains its Minimum Quantity Order Attribute, such that the Order may execute only against incoming Orders with a size of at least the minimum quantity condition. An Order that has a Minimum Quantity Order Attribute and that posts to the PSX Book will not be displayed

Upon entry, an Order with a Minimum Quantity Order Attribute must have a size of at least one round lot. An Order entered through OUCH or FLITE may have a minimum quantity condition of any size of at least one round lot. An Order entered through RASH or FIX must have a minimum quantity of one round lot or any multiple thereof, and a mixed lot minimum quantity condition will be rounded down to the nearest round lot. In the event that the shares remaining in the size of an Order with a Minimum Quantity Order Attribute following a partial execution thereof are less than the minimum quantity specified by the Participant entering the Order, the minimum quantity value of the Order will be reduced to the number of shares remaining. An Order with a Minimum Quantity Order Attribute may not be displayed; if a Participant marks an Order with both a Minimum Quantity Order Attribute and a Display Order Attribute, the System will accept the Order but will give a Time-in-Force of IOC, regardless of the Time-in-Force marked by the Participant. An Order marked with a Minimum Quantity Order Attribute and a Routing Order Attribute will be rejected.

(f) Routing. Routing is an Order Attribute that allows a Participant to designate an Order to employ one of several Routing Strategies offered by PSX, as described in Equity 4, Rule 3315; such an Order may be referred to as a "Routable Order." Upon receipt of an Order with the Routing Order Attribute, the System will process the Order in accordance with the applicable Routing Strategy. In the case of a limited number of Routing Strategies, the Order will be sent directly to other market centers for potential execution. For most other Routing Strategies, the Order will attempt to access liquidity available on PSX in the manner specified for the underlying Order Type and will then be routed in accordance with the applicable Routing Strategy. Shares of the Order that cannot be executed are then returned to PSX, where they will (i) again attempt to access liquidity available on PSX and (ii) post to the PSX Book or be cancelled, depending on the Time-in-Force of the Order. Under certain Routing Strategies, the Order may be routed again if the System observes an accessible quotation of another market center, and returned to PSX again for potential execution and/or posting to the PSX Book. In connection with the trading of securities governed by Regulation NMS, all Orders shall be routed for potential execution in compliance with Regulation NMS. Where appropriate, Routable Orders will be marked as Intermarket Sweep Orders.

(g) Discretion. Discretion is an Order Attribute under which an Order has a non-displayed discretionary price range within which the entering Participant is willing to trade; such an Order may be referred to as a "Discretionary Order." Thus, an Order with Discretion has both a price (for example, buy at $11) and a discretionary price range (for example, buy up to $11.03). Depending on the Order Type used, the price may be displayed (for example, a Price to Display Order) or non-displayed (for example, a Non-Displayed Order). The discretionary price range is always non-displayed. In addition, it should be noted that the Discretion Order Attribute may be combined with the Pegging Order Attribute, in which case either the price of the Order or the discretionary price range or both may be pegged in the ways described in Equity 4, Rule 3301A(d) with respect to the Pegging Order Attribute. For example, an Order with Discretion to buy might be pegged to the Best Bid with a $0.05 passive Offset and might have a discretionary price range pegged to the Best Bid with a $0.02 passive Offset. In that case, if the Best Bid was $11, the price of the Order would be $10.95, with a discretionary price range up to $10.98. If the Best Bid moved to $10.99, the price of the Order would then be $10.94, with a discretionary price range up to $10.97. Alternatively, if the price of the Order was pegged but the discretionary price range was not, the price of the Order would be $10.94, but the discretionary price range would continue to range up to $10.98. Likewise, if the discretionary price range was pegged but the price of the Order was not, the Order would remain priced at $10.95 but with a discretionary price range of up to $10.97. A Participant may also specify a limit on the discretionary price range of an Order that is entered with a Discretionary Pegging Attribute, beyond which the discretionary pegged price may not extend.

The System processes an Order with Discretion as follows. First, upon entry of an Order with Discretion, the Exchange will execute the Order against any previously posted Orders on the Exchange Book that are priced equal to or better than the limit price of the Order with Discretion. If, however, an Order with Discretion has a Time-in-Force of IOC upon entry, then the Order will immediately attempt to execute against available liquidity in the discretionary range without first posting to the Exchange Book. Second, any portion of the Order with Discretion that cannot be executed immediately will post to the Exchange Book, in accordance with the parameters of the underlying Order Type. Third, once the Order with Discretion posts to the Exchange Book and thereafter, the System will examine all Orders (including Orders that are not Displayed) on the Exchange Book to determine whether at any time there is liquidity available within the discretionary price range against which the Order with Discretion could execute. Fourth, if the System observes liquidity available within the discretionary price range, it will generate a Non-Displayed Order with a Time-in-Force of IOC (a "Discretionary IOC"), with a price equal to the highest price for the Order with Discretion to buy (lowest price for the Order with Discretion to sell) within the discretionary price range and a size equal to the applicable size of the available liquidity on the Exchange Book, which will attempt to access that liquidity. The Discretionary IOC will not be permitted to execute, however, if the price of the execution would trade through a Protected Quotation. Fifth, if the available liquidity does not fully exhaust the Discretionary IOC, then the System will remove any remaining shares of the Order with Discretion from the Exchange Book, combine them with the unexecuted portion of the Discretionary IOC, and post the Discretionary Order back to the Exchange Book with a new timestamp. Thus, for example, if a Participant enters a Price to Display Order to buy 500 shares at $11 with a discretionary price range of up to $11.03, then upon entry, the System will first execute the Order against any orders resting on the Exchange Book that are priced equal to or better than the limit price of the Discretionary Order. Assuming that no such resting orders exist, the System will post the full size of the Price to Display Order to the Exchange Book in accordance with its parameters. If there is an Order on the Exchange Book to sell 200 shares priced at $11.03, the System will generate a Discretionary IOC to buy priced at $11.03 to execute against the Order on the Exchange Book, so long as an execution at $11.03 would not trade through a Protected Quotation; the remaining 300 shares of the original Order with Discretion will remain posted on the Exchange Book.

Notwithstanding the above, the following process shall apply to an Order that has been assigned both Discretion and Routing Order Attributes. For those routing strategies that first examine the Exchange Book for available liquidity, upon entry of the Order, the System will examine all Orders (including Orders that are not Displayed) on the Exchange Book to determine if there is liquidity available within the discretionary price range against which the Order with Discretion could execute. If the System observes such liquidity, it will generate a Discretionary IOC with a price equal to the highest price for the Order with Discretion to buy (lowest price for the Order with Discretion to sell) within the discretionary price range and a size equal to the applicable size of the available liquidity on the Exchange Book. If existing liquidity on the Exchange Book does not exhaust the full size of the Order with Discretion, or if the selected routing strategy does not examine the Exchange Book for available liquidity before routing, the System will determine if there are any accessible quotations with prices that are within the discretionary price range at destinations on the applicable routing table for the selected routing strategy. If there are such quotations, the System will generate one or more Discretionary IOCs to route to such destinations, in accordance with the applicable routing strategy, with a price that matches the price of the market center's quotation and a size determined by the router to maximize execution opportunities. If necessary to maximize execution opportunities and comply with Regulation NMS, the System may mark such Discretionary IOCs as Intermarket Sweep Orders. If the routed Discretionary IOC(s) do not exhaust the full size of the Order with Discretion, the remaining size of the Order with Discretion will examine the Exchange Book for available liquidity at any time and/or post to the Exchange Book in accordance with the parameters that apply to the underlying Order Type. Thereafter, if the Order with Discretion uses a reactive routing strategy (i.e., a strategy that seeks routing opportunities after posting to the Exchange Book), the System will generate and route one or more additional Discretionary IOCs in response to new away market quotations within the discretionary price range according to the routing strategy assigned to the Discretionary Order, with a price that matches the price of the away market quotation and a size determined by the router to maximize execution opportunities. If the Order with Discretion uses a passive routing strategy (i.e., a strategy that does not seek routing opportunities after posting to the Exchange Book), the System will not generate additional Discretionary IOC orders in response to new away market quotations within the discretionary price range unless the Order is updated in a manner that causes it to receive a new timestamp, in which case the Order will behave in the same manner as a newly entered Discretionary Order. Whenever a Discretionary IOC is generated in response to quotations as set forth in this paragraph, the underlying Order with Discretion will be withheld (if not yet booked) or removed (if already booked) from the Exchange Book; if execution against the Discretionary IOC does not exhaust the full size of the underlying Order with Discretion, the remaining shares will be routed again in accordance with the applicable routing strategy, with a price that matches the price of the away market quotation and a size determined by the router to maximize execution opportunities, and/or placed on the Exchange Book, with a price determined by the underlying Order Type and Order Attributes selected by the Participant. Furthermore, if a new quotation satisfies conditions that would cause the simultaneous generation of a Discretionary IOC for more than one Order with Discretion that have been assigned a Routing Order Attribute, the order in which such Discretionary IOCs are presented for execution is random, based on the respective processing time for each such Order.

(h) Reserve Size. Reserve Size is an Order Attribute that permits a Participant to stipulate that an Order Type that is displayed may have its displayed size replenished from additional non-displayed size. An Order with Reserve Size may be referred to as a "Reserve Order." At the time of entry, the displayed size of such an Order selected by the Participant must be one or more normal units of trading; an Order with a displayed size of a mixed lot will be rounded down to the nearest round lot. A Reserve Order with displayed size of an odd lot : (i) entered using OUCH will be rejected; or (ii) entered using RASH or FIX will be accepted but with the full size of the Order displayed. Reserve Size is not available for Orders that are not displayed; provided, however, that if a Participant enters Reserve Size for a Non-Displayed Order, the full size of the Order, including Reserve Size, will be processed as a Non-Displayed Order.

Whenever a Participant enters an Order with Reserve Size, the full size of the Order will be presented for potential execution in compliance with Regulation NMS; thereafter, unexecuted portions of the Order will be processed as two Orders: a Displayed Order (with the characteristics of its selected Order Type) and a Non-Displayed Order. For example, a Participant might enter a Price to Display Order with 200 shares displayed and an additional 3,000 shares non-displayed. Upon entry, the Order would attempt to execute against available liquidity on the PSX Book, up to 3,200 shares. Thereafter, unexecuted portions of the Order would post to the PSX Book as a Displayed Price to Display Order and a Non-Displayed Order; provided, however, that if the remaining total size is less than the display size stipulated by the Participant, the Displayed Order will post without Reserve Size. Thus, if 3,050 shares executed upon entry, the Price to Display Order would post with a size of 150 shares and no Reserve Size.

When an Order with Reserve Size is posted, if there is an execution against the Displayed Order that causes its size to decrease below a normal unit of trading, another Displayed Order will be entered at the limit price and size stipulated by the Participant while the size of the Non-Displayed Order will be reduced by the same amount. Any remaining size of the original Displayed Order will remain on the PSX Book. The new Displayed Order will receive a new timestamp, but the Non-Displayed Order (and the original Displayed Order, if any) will not; although the new Displayed Order will be processed by the System as a new Order in most respects at that time, if it was designated as Routable, the System will not automatically route it upon reentry. If the new Displayed Order would lock an Order that posted to the PSX Book before replenishment can occur, the Displayed Order will post at the locking price if the resting Order is Non-Display or will be repriced, ranked, and displayed at one minimum price increment lower (higher) than the locking price if the resting order to sell (buy) is Displayed. For example, if a Price to Comply Order with Reserve Size posted with a Displayed Size of 200 shares, along with a Non-Displayed Order of 3,000 and 150 shares of the Displayed Order was executed, the remaining 50 shares of the original Price to Comply Order would remain, a new Price to Comply Order would post with a size of 200 shares and a new timestamp, and the Non-Displayed Order would be decremented to 2,800 shares. Because a new Displayed Order is entered and the Non-Displayed Order is not reentered, there are circumstances in which the Displayed Order may receive a different price than the Non-Displayed Order. For example, if, upon reentry, a Price to Display Order would lock or cross a newly posted Protected Quotation, the price of the Order will be adjusted but its associated Non-Displayed Order would not be adjusted. In that circumstance, it would be possible for the better priced Non-Displayed Order to execute prior to the Price to Display Order.

In addition, the Participant may stipulate that the original and subsequent displayed size will be an amount randomly determined based on factors selected by the Participant (a “Random Reserve”). When a Participant stipulates use of a Random Reserve, the Participant would select both (i) a nominal displayed size and (ii) a range size, which may be any share amount less than the nominal displayed size. The actual displayed size will then be randomly determined by the System from a range of normal trading units in which the minimum size is the nominal displayed size minus the range size, and the maximum size is (i) the minimum size plus (ii) an amount that is two times the range size minus one round lot. For example, if the nominal displayed size is 600 shares and the range size is 500, the minimum displayed size will be 100 shares (600-500), and the maximum size will be 1,000 shares ((600-500) + ((2 x 500) - 100)).

When the Displayed Order with Reserve Size is executed and replenished, applicable market data disseminated by PSX will show the execution and decrementation of the Displayed Order, followed by replenishment of the Displayed Order.

(i) Attribution. Attribution is an Order Attribute that permits a Participant to designate that the price and size of the Order will be displayed next to the Participant's MPID in market data disseminated by PSX. An Order with Attribution is referred to as an "Attributable Order" and an Order without attribution is referred to as a "Non-Attributable Order."

(j) Intermarket Sweep Order. Designation of an Order as an Intermarket Sweep Order, or ISO, is an Order Attribute that allows the Order to be executed within PSX by Participants at multiple price levels without respect to Protected Quotations of other market centers within the meaning of Rule 600(b) under Regulation NMS. ISOs are immediately executable within PSX against Orders against which they are marketable. An Order designated as an ISO may not be assigned a Routing Order Attribute. In connection with the trading of securities governed by Regulation NMS, Intermarket Sweep Orders shall be executed exclusively within the System and the entering Participant shall be responsible for compliance with Rules 610 and 611 under Regulation NMS with respect to order protection and locked and crossed markets with respect to such Orders. Orders eligible for execution outside the System shall be processed in compliance with Regulation NMS, including accessing Protected Quotations and resolving locked and crossed markets, as instructed.

Simultaneously with the routing of an ISO to the System, one or more additional limit orders, as necessary, are routed by the entering Participant to execute against the full displayed size of any Protected Quotation with a price that is superior to the price of the Order identified as an Intermarket Sweep Order (as defined in Rule 600(b) under Regulation NMS). These additional routed orders must be identified as Intermarket Sweep Orders.

Upon receipt of an ISO, the System will consider the stated price of the ISO to be available for other Orders to be entered at that price, unless the ISO is not itself accepted at that price level (for example, a Post-Only Order that has its price adjusted to avoid executing against an Order on the PSX Book) or the ISO is not Displayed.

In addition, as described with respect to various Order Types, such as the Price to Comply Order, Orders on the PSX Book that had their price adjusted may be eligible to be reentered at the stated price of the ISO. For example, if a Price to Comply Order to buy at $11 would lock a Protected Offer at $11, the Price to Comply Order will be posted with a non-displayed price of $11 and a displayed price of $10.99. If the System then receives an ISO to buy at $11, the ISO will be posted at $11 and the Price to Comply Order will be reentered at $11 (if the Participant opted to have its Orders reentered). The respective priority of such reentered Orders will be maintained among multiple repriced Orders; however, other new Orders may also be received after receipt of the ISO but before the repricing of the Price to Comply Order is complete; accordingly, the priority of an Order on the PSX Book vis-à-vis a newly entered Order is not guaranteed.

(k) Display. Display is an Order Attribute that allows the price and size of an Order to be displayed to market participants via market data feeds. All Orders that are Attributable are also displayed, but an Order may be displayed without being Attributable. As discussed in Equity 4, Rule 3301A, a Non-Displayed Order is a specific Order Type, but other Order Types may also be non-displayed if they are not assigned a Display Order Attribute; however, depending on context, all Orders that are not displayed may be referred to as "Non-Displayed Orders." An Order with a Display Order Attribute may be referred to as a "Displayed Order."

(l) Trade Now. Trade Now is an Order Attribute that allows a resting Order that becomes locked or crossed, as applicable, at its non-displayed price by the posted price of an incoming Displayed Order or a Midpoint Peg Post-Only Order to execute against a locking or crossing Order(s) as a liquidity taker automatically. Any remaining shares of the resting Order will remain posted on the PSX Book with the same priority.

• When entered through the OUCH, RASH, or FIX protocols, the Trade Now Order Attribute may be enabled on an order-by-order or a port-level basis. When entered through FLITE, the Trade Now Order Attribute may be enabled on a port-level basis for all Order Types that support it, and for the Non-Displayed Order Type, also on an order-by-order basis.

• If there is a resting Order on the Exchange Book without the Trade Now Attribute that is locked at its non-displayed price by a Midpoint Peg Post-Only Order, new incoming Orders (with or without the Trade Now Attribute, as applicable) will be able to execute against the Midpoint Peg Post-Only Order at the locking price. The resting Order will remain on the Exchange Book and will retain its priority relative to other resting orders on the same side of the market after the subsequent Order has executed against the Midpoint Peg Post-Only Order.

Adopted Jan. 22, 2021 (SR-Phlx-2021-04); amended February 23, 2021 (SR-Phlx-2021-11); amended July 2, 2021 (SR-Phlx-2021-40), operative September 17, 2021; amended Oct. 25, 2021 (SR-Phlx-2021-67), operative Jan. 14, 2022; amended Sep. 9, 2022 (SR-Phlx-2022-35), operative Oct. 10, 2022; amended Sep. 5, 2023 (SR-Phlx-2023-43), operative Oct. 4, 2023.

The System will be opened for order entry at 8:00 a.m. and will begin to process each order in accordance with its characteristics immediately. All trades executed prior to 9:30 a.m. shall be automatically appended with the ".T" modifier.

Adopted Jan. 22, 2021 (SR-Phlx-2021-04).

(a) Definitions. For purposes of this Rule, the terms "covered security," "listing market," and "national best bid" shall have the same meaning as in Rule 201 of Regulation SHO.

(b) Short Sale Price Test. The System (as defined in Equity 1, Section 1(a)) shall not execute or display a short sale order with respect to a covered security at a price that is less than or equal to the current national best bid if the price of that security decreases by 10% or more, as determined by the listing market for the security, from the security's closing price on the listing market as of the end of regular trading hours on the prior day ("Trigger Price").

(c) Duration of Short Sale Price Test. If the Short Sale Price Test is triggered by the listing market with respect to a covered security, the Short Sale Price Test shall remain in effect until the close of trading on the next trading day, as provided for in Regulation SHO Rule 201(b)(1)(ii) (the "Short Sale Period").

(d) Re-pricing of Orders during Short Sale Period. Except as provided below, during the Short Sale Period, short sale orders that are limited to the national best bid or lower and short sale market orders will be re-priced by the System one minimum allowable price increment above the current national best bid ("Permitted Price"). To reflect declines in the national best bid, the Exchange will continue to re-price a short sale order at the lowest Permitted Price down to the order's original limit price, or if a market order, until the order is filled. Non-displayed orders between the PSX bid and offer at the time of receipt will also be re-priced upward to a Permitted Price to correspond with a rise in the national best bid.

(1) During the Short Sale Period, immediate or cancel orders ("IOC") requiring that all or part of the order be executed immediately will be executed at a Permitted Price and higher and then cancelled, and will not be re-priced. IOC short sale orders that are inter-market sweep orders and not marked "short exempt" will be handled in the same manner as IOC orders.

(2) During the Short Sale Period, if an order was entered as a long sale order or a short sale exempt order but is subsequently marked pursuant to Equity 4, Rule 3306(a)(3) as a short sale order, the System will cancel the order unless it is priced at a Permitted Price or higher.

(e) Execution of Permissible Orders during the Short Sale Period. During the Short Sale Period, the System will execute and display a short sale order without regard to whether the order is at a Permitted Price or higher if, at the time of initial display of the short sale order, the order was at a price above the then current national best bid. Short sale orders that are entered into the Exchange prior to the Short Sale Period but are not displayed will be re-priced as described in (d) above.

(f) Short Exempt Orders. During the Short Sale Period, the System will execute and display orders marked "short exempt" without regard to whether the order is at a Permitted Price or higher. The System will accept orders marked "short exempt" at any time when the System is open for order entry, regardless of whether the Short Sale Price Test has been triggered.

Adopted Jan. 22, 2021 (SR-Phlx-2021-04).

(a) The PSX System consumes quotation data from the below proprietary and network processor feeds for the handling, routing, and execution of orders, as well as for the regulatory compliance processes related to those functions. The Primary Source of data is used unless it is delayed by a configurable amount compared to the Secondary Source of data. The Exchange will revert to the Primary Source of data once the delay has been resolved. The configurable amount described in this rule will be made available to members via Equity Trader Alert.

(b) SIP Trade and Administrative Data. The SIP is the Primary Source of trade and administrative messages such as limit-up limit-down price bands, market-wide circuit breaker decline and status messages, Regulation SHO state messages, halts and resumes, and last sale information. Where available, the Direct Feeds are the Secondary Source of such information.

Adopted Jan. 22, 2021 (SR-Phlx-2021-04); amended February 4, 2021 (SR-Phlx-2021-08), operative March 6, 2021; amended June 8, 2021 (SR-Phlx-2021-35).

(a) Entry of Orders—Participants can enter orders into the System, subject to the following requirements and conditions:

(1) Participants shall be permitted to transmit to the System multiple orders at a single as well as multiple price levels. Each order that is designated as a Reserve Order shall indicate the amount of Reserve Size.

(2) The System shall time-stamp an order, which shall determine the time ranking of the order for purposes of processing the order.

(3) Orders can be entered into the System (or previously entered orders cancelled or modified) from 8:00 a.m. until 5:00 p.m. ET. Participants may modify a previously entered Order without cancelling it or affecting the priority of the Order on the PSX Book solely for the purpose of modifying the marking of a sell order as long, short, or short exempt; provided, however, that such a modification may be made only with respect to Orders entered through OUCH or FLITE; and provided further, that if an Order is re-designated as short, a Short Sale Period is in effect under Equity 4, Rule 3303, and the Order is not priced at a Permitted Price or higher under Equity 4, Rule 3303(d), the Order will be cancelled. In addition, a partial cancellation of an Order to reduce its share size will not affect the priority of the Order on the book. Except as provided in Equity 4, Rule 3311, all other modifications of orders will result in the replacement of the original order with a new order with a new time stamp.

(4) Each Order is subject to a daily limit on the number of changes that may occur with respect to the Order; if the daily limit is reached, the Order will be cancelled. The number of permissible changes may vary by Order Type or Order Attribute and may change from time to time. The Exchange will post on its website what is considered a change for a particular Order Type and Order Attribute, and the current limits on the number of such changes.

(b) Entry of Quotes—PSX Market Makers and Equities ECNs can enter Quotes into the System from 8:00 a.m. to 5:00 p.m. Eastern Time. Quotes will be processed as Attributable Orders, with such time-in-force designation as the PSX Market Maker or Equities ECN may assign. Entry of Quotes will be subject to the requirements and conditions set forth in section (a) above.

(c) Display of Quotes and Orders—The System will display Quotes and Orders submitted to the System as follows:

(1) System Book Feed—Quotes and Orders resident in the System available for execution will be displayed via the System Book Feed.

(2) Best Priced Order Display—Pursuant to Rule 602 of Regulation NMS under the Exchange Act, the Exchange will transmit for display to the appropriate network processor for each System Security:

(i) the highest price to buy wherein the aggregate size of all displayed buy interest in the System greater than or equal to that price is one round lot or greater;

(ii) the aggregate size of all displayed buy interest in the System greater than or equal to the price in (i), rounded down to the nearest round lot; 

(iii) the lowest price to sell wherein the aggregate size of all displayed sell interest in the System less than or equal to that price is one round lot or greater; and

(iv) the aggregate size of all displayed sell interest in the System less than or equal to the price in (iii), rounded down to the nearest round lot. 

(3) Exceptions—The following exceptions shall apply to the display parameters set forth in paragraphs (1) and (2) above:

(A) Reserve Size—Reserve Size shall not be displayed in the System, but shall be accessible as described in Equity 4, Rule 3307.

(B) Discretionary Orders—The discretionary portion of Discretionary Orders shall not be displayed but shall be made available for execution only upon the appearance of contra-side marketable trading interest, and shall be executed pursuant to Equity 4, Rule 3307.

(C) Non-Displayed Orders—Non-Displayed Orders are not displayed in the System, and have lower priority within the System than an equally priced Displayed Order, regardless of time stamp, and shall be executed pursuant to Equity 4, Rule 3307.

(4) In connection with the trading of securities governed by Regulation NMS, pursuant to rule 600(b)(4) of Regulation NMS under the Act, the Exchange has implemented such systems, procedures, and rules as are necessary to render it capable of meeting the requirements for automated quotations, as defined in rule 600(b)(3) of Regulation NMS under the Act; and immediately to identify its quotations as manual whenever it has reason to believe it is not capable of displaying automated quotations. The Exchange has adopted policies and procedures for notifying member organizations and other trading centers that it has reason to believe it is not capable of displaying automated quotations or, once manual, that it has restored the ability to display automated quotations and is preparing to identify its quotation as automated. In addition, the Exchange has adopted policies and procedures for responding to notices that it receives from other trading centers indicating that they have elected to use the "self-help" exception of rule 611(b)(1) of Regulation NMS under the Act.

Adopted Jan. 22, 2021 (SR-Phlx-2021-04); amended Apr. 11, 2022 (SR-Phlx-2022-17), operative Aug. 22, 2022.

System orders shall be executed in accordance with one of two execution algorithms: Price/Time or Pro Rata. Securities that are subject to the Pro Rata algorithm may also be subject to the variation for Price-Setting Orders described in Equity 4, Rule 3307(b)(2)(B). The algorithm applicable to a particular security (including the applicability of the variation for Price-Setting Orders) will be selected by the President of the Exchange or another officer of the Exchange designated by the President for this purpose, and will be listed on a publicly available website. The Exchange will notify member organizations of changes in the algorithm applicable to a particular security (including the applicability of the variation for Price-Setting Orders) through a notice that is widely disseminated at least one month in advance of the change. In selecting the applicable algorithm (including the applicability of the variation for Price-Setting Orders), the Exchange will conduct ongoing assessments of the depth of liquidity made available by member organizations in particular stocks, with the goal of maximizing the displayed size, minimizing the quoted spread, and increasing the extent of PSX's time at the national best bid and best offer. Factors to be considered for each security would include the size of member organizations' quotes, the amount of time that PSX is at the national best bid and best offer, PSX's market share, and observed changes in volume, average execution size, and average order size.

(a) Price/Time Execution Algorithm—Under the Price/Time execution algorithm, the System shall execute trading interest within the System in the following order:

(1) Price—Better priced trading interest will be executed ahead of inferior-priced trading interest.

(2) Display—Displayed Quotes/Orders at a particular price will be executed in time priority among such interest.

(3) Non-Displayed Interest—Non-Displayed Orders and the reserve portion of Quotes and Reserve Orders (collectively, "Non-Displayed Interest") at a particular price will be executed in time priority among such interest.

(b) Pro Rata Execution Algorithm—Under the Pro Rata Execution Algorithm, the System shall execute trading interest within the System in the following order:

(1) Price—Better priced trading interest will be executed ahead of inferior-priced trading interest.

(2) Display—Displayed Orders at a particular price with a size of at least one round lot will be executed ahead of Displayed Orders with a size of less than one round lot, Non-Displayed Interest with a size of at least one round lot, Minimum Quantity Orders, and Non-Displayed Interest with a size of less than one round lot at the same price. 

(A) Allocation to Displayed Orders with a Size of One Round Lot or More—As among equally priced Displayed Orders with a size of at least one round lot, the System will allocate round lot portions of incoming executable orders to displayed trading interest within the System pro rata based on the size of the Displayed Orders, rounding down to the nearest round lot. Next, portions of an order that would be executed in a size other than a round lot if they were allocated on a pro rata basis will be allocated for execution against available displayed trading interest, one round lot at a time, in the order of the displayed size (measured at the time when the pro rata allocation began) of the trading interest at that price (largest to smallest), or, as among orders with an equal size, based on time priority. Incoming orders with a size of less than one round lot will be allocated against available displayed trading interest in the order of the size of displayed trading interest at that price (largest to smallest), or, as among orders with an equal size, based on time priority.

Example 1: 

Displayed Orders to sell at $10.00 reside on the PSX book with sizes of 600 shares (Order 1), 400 shares (Order 2), and 300 shares (Order 3). 

An incoming order to buy 1,200 shares at $10.00 is entered.

The System allocates the incoming order as follows:

• 500 shares to Order 1 ((600 ÷ 1,300) x 1,200, rounded down to the nearest round lot)

• 300 shares to Order 2 ((400 ÷ 1,300) x 1,200, rounded down to the nearest round lot)

• 200 shares to Order 3 ((300 ÷ 1,300) x 1,200, rounded down to the nearest round lot)

• 100 shares to Order 1 (order with the largest displayed size at the beginning of the pro rata allocation)

• 100 shares to Order 2 (order with the next largest displayed size at the beginning of the pro rata allocation)

Example 2: 

Displayed Orders to sell at $10.00 reside on the PSX book with sizes of 600 shares (Order 1), 400 shares (Order 2), and 300 shares (Order 3). 

An incoming order to buy 80 shares at $10.00 is entered.

The System allocates the incoming order as follows:

• 80 shares to Order 1 (resting order with the largest displayed size)

(B) Variation for Price-Setting Orders. The Exchange may designate a security for the variation of the Pro Rata algorithm for Price-Setting Orders. For such a security, a Displayed Order with a size of at least one round lot that establishes the best price in PSX when it is entered will be a "Price-Setting Order" if such order is executed; provided, however, that a better priced order will become the Price-Setting Order if it is executed. The allocation to the Price-Setting Order will be the greater of 40% (the "Guaranteed Percentage") or the percentage that the order would otherwise be allocated under the Pro Rata algorithm. If the Price-Setting Order receives an allocation greater than the Guaranteed Percentage, the remainder of the order will be allocated to other displayed trading interest in the manner provided in Equity 4, Rule 3307(b)(2)(A). If the Price-Setting Order receives the Guaranteed Percentage, the System will then allocate round lot portions of the incoming order that are not allocated to the Price- Setting Order to other displayed trading interest within the System pro rata based on the size of such Displayed Orders (excluding the Price-Setting Order), rounding down to the nearest round lot. Next, portions of an order that would be executed in a size other than a round lot if they were allocated on a pro rata basis will be allocated for execution against available displayed trading interest (excluding the Price-Setting Order), one round lot at a time, in the order of the displayed size (measured at the time when the pro rata allocation began) of the trading interest at that price (largest to smallest), or, as among orders with an equal size, based on time priority. In the case of incoming orders with a size of less than one round lot, the Price-Setting Order will receive the Guaranteed Percentage of the order, and the remainder of the order will be allocated to available displayed trading interest in the order of the size of displayed trading interest at that price (largest to smallest), or, as among orders with an equal size, based on time priority.

Example 3: 

A Displayed Order to sell 1,000 shares at $10.01 resides on the PSX book (Order 1). A Displayed Order to sell 1,000 shares at $10.00 is entered and becomes the Price-Setting Order (Order 2). Additional Displayed Orders to sell at $10.00 with sizes of 3,000 shares (Order 3) and 1,000 shares (Order 4) are then entered.

An incoming order to buy 1,000 shares at $10.00 is entered.

The System allocates the incoming order as follows:

• 400 shares to Order 2 (40% allocated to the Price-Setting Order)

• 400 shares to Order 3 ((3,000 ÷ 4,000) x 600, rounded down to the nearest round lot)

• 100 shares to Order 4 ((1,000 ÷ 4,000) x 600, rounded down to the nearest round lot)

• 100 shares to Order 3 (order with the largest original displayed size)

Example 4: 

A Displayed Order to sell 1,000 shares at $10.01 resides on the PSX book (Order 1). A Displayed Order to sell 3,000 shares at $10.00 is entered and becomes the Price-Setting Order (Order 2). Additional Displayed Orders to sell at $10.00 with sizes of 1,000 shares (Order 3) and 1,000 shares (Order 4) are then entered.

An incoming order to buy 1,000 shares at $10.00 is entered.

The System allocates the incoming order as follows:

• 600 shares to Order 2 ((3,000 ÷ 5,000) x 1,000, resulting in an allocation in excess of the Guaranteed Percentage)

• 200 shares to Order 3 ((1,000 ÷ 5,000) x 1,000)

• 200 shares to Order 4 ((1,000 ÷ 5,000) x 1,000)

Example 5: 

A Displayed Order to sell 1,000 shares at $10.01 resides on the PSX book (Order 1). A Displayed Order to sell 1,000 shares at $10.00 is entered and becomes the Price-Setting Order (Order 2). Additional Displayed Orders to sell at $10.00 with sizes of 3,000 shares (Order 3) and 1,000 shares (Order 4) are then entered.

An incoming order to buy 80 shares at $10.00 is entered.

The System allocates the incoming order as follows:

• 32 shares to Order 2 (40% allocated to the Price-Setting Order)

• 48 shares to Order 3 (resting order with the largest displayed size)

(3) Displayed Odd-Lot Orders—As among equally priced Displayed Orders with a size of less than one round lot, the System will allocate incoming orders against available trading interest in the order of the size of the trading interest at that price (largest to smallest), or, as among orders with an equal size, based on time priority.

(4) Non-Displayed Interest with a Size of One Round Lot or More—As among equally priced Non-Displayed Interest with a size of at least one round lot (excluding Minimum Quantity Orders), the System will allocate portions of incoming executable orders to Non-Displayed Interest within the System pro rata based on the size of Non-Displayed Interest, rounding down to the nearest round lot. Next, portions of an order that would be executed in a size other than a round lot if they were allocated on a pro rata basis will be allocated for execution against available Non-Displayed Interest, one round lot at a time, in the order of the size (measured at the time when the pro rata allocation began) of the trading interest at that price (largest to smallest), or, as among orders with an equal size, based on time priority. Incoming orders with a size of less than one round lot will be allocated against available Non-Displayed Interest in the order of the size of trading interest at that price (largest to smallest), or, as among orders with an equal size, based on time priority.

(5) Minimum Quantity Orders—As among equally priced Minimum Quantity Orders, the System will allocate incoming executable orders to Minimum Quantity Orders within the System in the ascending order of the size of the minimum quantity conditions assigned to the orders. Thus, an order with a minimum quantity condition of 300 shares will be filled before an order with a minimum quantity condition of 400 shares. If there are two or more Minimum Quantity Orders with an equal minimum quantity condition, the System will determine the order of execution based on time priority.

(6) Non-Displayed Odd-Lot Orders—As among equally priced Non-Displayed Interest with a size of less than one round lot, the System will allocate incoming orders based on the size of the Non-Displayed Interest, in the order of the size of the trading interest at that price (largest to smallest), or, as among orders with an equal size, based on time priority.

(c) Exception: Anti-Internalization—As an exception to both algorithms, market participants may direct that Quotes/Orders entered into the System not execute against Quotes/Orders entered under the same MPID or Quotes/Orders entered across MPIDs under Common Ownership. * In addition, market participants using the OUCH order entry protocol may assign to orders entered through a specific order entry port a unique group identification modifier that will prevent Quotes/Orders with such modifier from executing against each other. In such a case, a market participant may elect from the following options:

(A) if the interacting Quotes/Orders are equivalent in size, both Quotes/Orders will be cancelled back to their entering parties. If the interacting Quotes/Orders are not equivalent in size, share amounts equal to the size of the smaller of the two Quotes/Orders will be cancelled back to their originating parties with the remainder of the larger Quote/Order being retained by the System for potential execution;

(B) regardless of the size of the interacting Quotes/Orders, cancelling the oldest of them in full; or

(C) regardless of the size of the interacting Quotes/Orders, cancelling the most recent of them in full.

The foregoing options may be applied to all orders entered under the same MPID, across MPIDs under Common Ownership, * or, in the case of market participants using the OUCH order entry protocol, may be applied to all orders entered through a specific order entry port.

(d) Decrementation—Upon execution, an order shall be reduced by an amount equal to the size of that execution.

(e) Price Improvement—Any potential price improvement resulting from an execution in the System shall accrue to the taker of liquidity.

Example:

Buy order resides on book at 10.

Incoming order to sell priced at 9 comes into the System

Order executes at 10 (seller get $1 price improvement)

The text of Equity 4, Rule 3307(f) has been approved, but not implemented. The changes will be implemented no later than March 31, 2017. The Exchange will announce the specific date in advance through an Equities Trader Alert. 

(f) Limit Order Protection ("LOP"). LOP is a feature of PSX that prevents certain Limit Orders at prices outside of pre-set standard limits ("LOP Limit") from being accepted by the System.

(i) Applicability. LOP applies to all Quotes and Orders, including Quotes and Orders that have been modified, where the modification results in a new timestamp and priority. LOP does not apply to Orders with Market and Primary Pegging, Market Maker Peg Orders or Intermarket Sweep Orders. A Midpoint Pegging Order with a discretion price would not be subject to LOP. LOP is operational each trading day. LOP is not operational during trading halts and pauses. LOP would not apply in the event there is no established LOP Reference Price or the National Best Bid, when used as the LOP Reference Price, is equal to or less than $0.50.

(ii) LOP Limit. The LOP Limit shall be the greater of 10% of the LOP Reference Price or $0.50 for all securities across all trading sessions. 

(iii) LOP Reference Price. The LOP Reference Price shall be the current National Best Bid or Best Offer, the bid for sell orders and the offer for buy orders.

(iv) LOP Reference Threshold. The LOP Reference Threshold for buy orders will be the LOP Reference Price (offer) plus the applicable LOP Limit. The LOP Reference Threshold for sell orders will be the LOP Reference Price (bid) minus the applicable LOP Limit.

(v) Acceptance of Orders. LOP will reject incoming Limit Orders that exceed the LOP Reference Threshold. Limit Orders will be rejected if the price of the Limit Order is greater than the LOP Reference Threshold for a buy Limit Order. Limit Orders will be rejected if the price of the Limit Order is less than the LOP Reference Threshold for a sell Limit Order.

*For purposes of Equity 4, Rule 3307, the term "Common Ownership" shall mean participants under 75% common ownership or control.

Adopted Jan. 22, 2021 (SR-Phlx-2021-04); amended Oct. 21, 2022 (SR-Phlx-2022-43), operative Nov. 20, 2022.

Executions occurring as a result of orders matched on PSX shall be reported by the Exchange to an appropriate consolidated transaction reporting system. The System will identify trades executed pursuant to an exception to or exemption from rule 611 of Regulation NMS in accordance with specifications approved by the operating committee of the relevant national market system plan for an NMS Stock. If a trade is executed pursuant to both the intermarket sweep order exception of rule 611(b)(5) or (6) of Regulation NMS and the self-help exception of rule 611(b)(1) of Regulation NMS, such trade shall be identified as executed pursuant to the intermarket sweep order exception. The Exchange shall promptly notify PSX Participants of all executions of their orders as soon as the Exchange is notified that such executions have taken place.

Adopted Jan. 22, 2021 (SR-Phlx-2021-04).

(a) Transactions executed in the System shall be cleared and settled anonymously. The transaction reports produced by the System will indicate the details of the transactions, and shall not reveal contra party identities.

(b) The Exchange shall reveal a Participant's identity in the following circumstances:

(1) when a registered clearing agency ceases to act for a Participant, or the Participant's clearing firm, and the registered clearing agency determines not to guarantee the settlement of the Participant's trades;

(2) for regulatory purposes or to comply with an order of an arbitrator or court;

(3) if both Participants to the transaction consent;

(4) Unless otherwise instructed by a member organization, the Exchange will reveal to a member organization, no later than the end of the day on the date an anonymous trade was executed, when the member organization's Quote or Order has been decremented by another Quote or Order submitted by that same member organization.

Adopted Jan. 22, 2021 (SR-Phlx-2021-04).

(a) Except as provided below, the System will automatically cancel open quotes and/or orders in all System Securities resident in the System in response to issuer corporate actions, including any dividend (whether payable in cash or securities or both), payment, distribution, forward or reverse stock split, symbol change, or change in primary listing venue, immediately prior to the opening of the System at 8:00 a.m. on the ex-date of such actions.

(b) A member may designate that all orders with a time-in-force of good-till-cancelled that are entered through one or more order entry ports specified by the member will be processed in the following manner in the event of certain issuer corporate actions as specified below. The member may opt for the processing provided in this paragraph (b) on a port-by-port basis, but all of the provisions of this paragraph shall apply to all good-till-cancelled orders entered through a port that has been specified by the member hereunder.

(1) Cash Dividend. If an issuer is paying a cash dividend, the price of an order to buy will be reduced by the amount of the sum of all dividends payable, rounded up to the nearest whole cent; provided, however, that there will be no adjustment if the sum of all dividends is less than $0.01. For example, if the sum of all dividends is $0.381, the price of the order will be reduced by $0.39. An order to sell will be retained but will receive no price adjustment.

(2) Forward Stock Split or Stock Dividend. If an issuer is implementing a forward stock split or a stock dividend (i.e., a corporate action in which additional shares are issued to holders), the order will be cancelled if its size is less than one round lot. If the order's size is greater than one round lot, (i) the size of the order will be multiplied by the ratio of post-action shares to pre-action shares, with the result rounded downward to the nearest whole share, and (ii) the price of the order will be multiplied by the ratio of pre-action shares to post-action shares, with the result rounded down to the nearest whole penny in the case of orders to buy and rounded up to the nearest whole penny in the case of orders to sell. For example, if a member has entered a goodtill- cancelled order to buy 375 shares at $10.95 per share and the issuer implemented a split or dividend under which an additional 1.25 shares would be issued for each share outstanding, the size of the order would be adjusted to 843 shares (375 x 2.25/1 = 843.75, rounded down to 843) and the price of the order would be adjusted to $4.86 per share ($10.95 per share x 1/2.25 = $4.8667 per share, rounded down to $4.86 per share). An order to sell at the same price and size would be adjusted to 843 shares with a price of $4.87 per share.

(3) Combination of Cash Dividend and Forward Stock Split or Stock Dividend. If an issuer is implementing a cash dividend and a forward stock split or stock dividend on the same date, the adjustments described above will both be applied, in the order described in the notice of the corporate actions received by the Exchange.

(4) For other corporate actions, including symbol changes, changes in primary listing venue, reverse stock splits, and dividends payable in either cash or securities at the option of the stockholder, the order will be cancelled.

(5) All of the foregoing changes will be effected immediately prior to the opening of the System at 8:00 a.m. on the ex-date of the applicable corporate action. Open orders that are retained will be re-entered by the System (as adjusted above) immediately prior to the opening of the System, such that they will retain time priority over new orders entered at or after 8:00 a.m.

Adopted Jan. 22, 2021 (SR-Phlx-2021-04).

(a) Authority to Review Transactions Pursuant to Complaint of Market Participant

(1) Definition. For purposes of this Rule, the terms of a transaction executed on PSX are "clearly erroneous" when there is an obvious error in any term, such as price, number of shares or other unit of trading, or identification of the security. A transaction made in clearly erroneous error and cancelled by both parties or determined by the Exchange to be clearly erroneous will be removed from the consolidated tape.

(2) Requests and Timing of Review. A member organization that receives an execution on an order that was submitted erroneously to PSX for its own or customer account may request that the Exchange review the transaction under this Rule. An official of the Exchange shall review the transaction under dispute and determine whether it is clearly erroneous, with a view toward maintaining a fair and orderly market and the protection of investors and the public interest. Such requests for review shall be made in writing via electronic complaint or other means specified from time to time by the Exchange as announced in an Equity Trader Alert. A request for review shall include information concerning the time of the transaction(s), security symbol(s), number of shares, price(s), side (bought or sold), and factual basis for believing that the trade is clearly erroneous. Upon receipt of a timely filed request that satisfies the guidelines set forth in paragraph (a)(2)(C) the counterparty to the trade shall be notified by the Exchange as soon as practicable, but generally within 30 minutes. An Exchange official may request additional supporting written information to aid in the resolution of the matter. If requested, each party to the transaction shall provide, within 30 minutes of the request, any supporting written information. Either party to the disputed trade may request the supporting written information provided by the other party on the matter. 

(A) Filing Time Periods.

(i) Except as provided in paragraph (a)(2)(A)(ii) and (a)(2)(A)(iii), any member organization or person associated with a member organization that seeks to have a transaction reviewed pursuant to paragraph (a) hereof shall submit a written complaint to the Exchange within 30 minutes of the execution time.

(ii) Routed executions from other market centers will generally have an additional 30 minutes from receipt of their Participant's timely filing, but no longer than 60 minutes from the time of the execution at issue, to file with the Exchange for review of transactions routed to PSX from that market center and executed on PSX.

(iii) In the case of an Outlier Transaction, during Pre-Market or Post-Market Hours or eligible for review pursuant to paragraph (a)(2)(C)(1)(i), an Exchange official may at its sole discretion, and on a case-by-case basis, consider requests received pursuant to this Rule after 30 minutes, but not longer than 60 minutes after the transaction in question, depending on the facts and circumstances surrounding such request. "Outlier Transaction" means a transaction where:

A. the execution price of the security is greater than three times the current Numerical Guidelines set forth in paragraph (a)(2)(C)(2), or

B. the execution price of the security in question is not within the Outlier Transaction parameters set forth in paragraph (a)(2)(A)(iii)A. above, but the execution price breaches the 52-week high or 52-week low. In such cases, the Exchange may consider Additional Factors as outlined in paragraph (a)(2)(C)(2)(iii), in determining if the transaction qualifies for further review or if the Exchange shall decline to act.

(B) Once a party has applied to the Exchange for review and the transaction has been determined to be eligible for review, the transaction shall be reviewed and a determination rendered, unless (i) both parties to the transaction agree to withdraw the application for review prior to the time a decision is rendered by the Exchange official, or (ii) the complainant withdraws its application for review prior to the notification of counterparties. In the event that the Exchange official determines that the transaction in dispute is clearly erroneous, the official shall declare the transaction null and void. A determination shall be made generally within 30 minutes of receipt of the complaint, but in no case later than the start of Market Hours (9:30:00 to 4:00:00) on the following trading day. The parties shall be promptly notified of the determination.

(C) Clearly Erroneous Review.

(1) Review of transactions occurring during Market Hours. If the execution time of the transaction(s) under review is during Market Hours, the transaction will not be reviewable as clearly erroneous unless the transaction:

(i) is in an NMS Stock that is not subject to the Plan to Address Extraordinary Market Volatility Pursuant to Rule 608 of Regulation NMS under the Act (the “Limit Up-Limit Down Plan” or “LULD Plan”). In such case, the Numerical Guidelines set forth in subparagraph (C)(2) of this Rule will be applicable to such NMS Stock;

(ii) was executed at a time when Price Bands under the LULD Plan were not available, or is the result of an Exchange technology or systems issue that results in the transaction occurring outside of the applicable LULD Price Bands pursuant to paragraph (g), or is executed after the primary listing market for the security declares a regulatory trading halt, suspension, or pause pursuant to paragraph (i). A transaction subject to review pursuant to this paragraph shall be found to be clearly erroneous if the price of the transaction to buy (sell) that is the subject of the complaint is greater than (less than) the Reference Price, described in subparagraph (D) below, by an amount that equals or exceeds the applicable Percentage Parameter defined in Appendix A to the LULD Plan (“Percentage Parameters”); or

(iii) involved, in the case of (1) a corporate action or new issue or (2) a security that enters a Trading Pause pursuant to the LULD Plan and resumes trading without an auction, a Reference Price that is determined to be erroneous by an Officer of the Exchange or senior level employee designee because it clearly deviated from the theoretical value of the security. In such circumstances, the Exchange may use a different Reference Price pursuant to subparagraph (D)(2) of this Rule. A transaction subject to review pursuant to this paragraph shall be found to be clearly erroneous if the price of the transaction to buy (sell) that is the subject of the complaint is greater than (less than) the new Reference Price, described in subparagraph (D)(2) below, by an amount that equals or exceeds the Numerical Guidelines or Percentage Parameters, as applicable depending on whether the security is subject to the LULD Plan.

(2) Numerical Guidelines.

(i) Subject to the additional factors described in paragraph (a)(2)(C)(2)(iii) below, a transaction executed during Pre-Market or Post-Market Hours, or eligible for review pursuant to subparagraph (C)(1)(i), shall be found to be clearly erroneous only if the price of the transaction to buy (sell) that is the subject of the complaint is greater than (less than) the Reference Price by an amount that equals or exceeds the Numerical Guidelines set forth below.

(ii) Multi-Stock Events Involving Twenty or More Securities. Multi-Stock Events involving twenty or more securities may be reviewable as clearly erroneous if they occur during Pre-Market or Post-Market Hours or are eligible for review pursuant to subparagraph (C)(1)(i).  During Multi-Stock Events, the number of affected transactions is such that immediate finality may be necessary to maintain a fair and orderly market and to protect investors and the public interest. In such circumstances, the Exchange may use a Reference Price other than consolidated last sale. To ensure consistent application across market centers when this paragraph is invoked, the Exchange will promptly coordinate with the other market centers to determine the appropriate review period, which may be greater than the period of five minutes or less that triggered application of this paragraph, as well as select one or more specific points in time prior to the transactions in question and use transaction prices at or immediately prior to the one or more specific points in time selected as the Reference Price. The Exchange will nullify as clearly erroneous all transactions that are at prices equal to or greater than 30% away from the Reference Price in each affected security during the review period selected by the Exchange and other markets consistent with this paragraph.

(iii) Additional Factors. Except in the context of a Multi-Stock Event involving five or more securities, an Exchange official may also consider additional factors to determine whether an execution is clearly erroneous, provided the execution occurred during Pre-Market or Post-Market Hours or are eligible for review pursuant to subparagraph (C)(1)(i).  Such additional factors include, but are not limited to, system malfunctions or disruptions, volume and volatility for the security, derivative securities products that correspond to greater than 100% in the direction of a tracking index, news released for the security, whether trading in the security was recently halted/resumed, whether the security is an IPO, whether the security was subject to a stock-split, reorganization, or other corporate action, overall market conditions, Pre- Market and Post-Market Hours executions, validity of the consolidated tapes trades and quotes, consideration of primary market indications, and executions inconsistent with the trading pattern in the stock. Each additional factor shall be considered with a view toward maintaining a fair and orderly market and the protection of investors and the public interest.

(D) Reference Price. The Reference Price referred to in subparagraphs (C)(1) and (C)(2) above will be equal to the consolidated last sale immediately prior to the execution(s) under review except for:

(1) in the case of Multi-Stock Events involving twenty or more securities, as described in subparagraph (C)(2)(ii) above;

(2) in the case of an erroneous Reference Price, as described in subparagraph (C)(1)(iii) above. In the case of (C)(1)(iii)(1), the Exchange would consider a number of factors to determine a new Reference Price that is based on the theoretical value of the security, including but not limited to, the offering price of the new issue, the ratio of the stock split applied to the prior day’s closing price, the theoretical price derived from the numerical terms of the corporate action transaction such as the exchange ratio and spin-off terms, and for an OTC up-listing, the price of the security as provided in the prior day’s FINRA Trade Dissemination Service final closing report. In the case of (C)(1)(iii)(2), the Reference Price will be the last effective Price Band that was in a limit state before the Trading Pause; or

(3) in other circumstances, such as, for example, relevant news impacting a security or securities, periods of extreme market volatility, sustained illiquidity, or widespread system issues, where use of a different Reference Price is necessary for the maintenance of a fair and orderly market and the protection of investors and the public interest, provided that such circumstances occurred during Pre-Market or Post-Market Hours or are eligible for review pursuant to subparagraph (C)(1)(i).

(b) Procedures for Reviewing Transactions on the Exchange's Own Motion

(1) Senior Official Acting on Own Motion. A Senior Official, acting on his or her own motion, may review potentially erroneous transactions occurring during Pre-Market or Post-Market Hours or that are eligible for review pursuant to paragraph (a)(2)(C)(1), and declare trades null and void or shall decline to take any action in connection with the completed trade(s). In such events, the Senior Official will rely on the provisions of paragraph (a)(2)(C)(1)-(2) of this Rule. Absent extraordinary circumstances, any such action of the Senior Official shall be taken in a timely fashion, generally within thirty (30) minutes of the detection of the erroneous transaction. When extraordinary circumstances exist, any such action of the Senior Official must be taken by no later than the start of Market Hours on the trading day following the date of execution(s) under review. When such action is taken independently, each party involved in the transaction shall be notified as soon as practicable by the Exchange, and the party aggrieved by the action may appeal such action in accordance with the provisions of paragraph (c)(1) below.

(c) Review by the Exchange Review Council

(1) A member organization or person associated with a member organization may appeal a determination made under paragraph (a) to the Exchange Review Council. A member organization or person associated with a member organization may appeal a determination made under paragraph (b) to the Exchange Review Council unless the Senior Official making the determination also determines that the number of the affected transactions is such that immediate finality is necessary to maintain a fair and orderly market and to protect investors and the public interest, and further provided that with respect to rulings made by the Exchange in conjunction with one or more additional market centers, the number of affected transactions is similarly such that immediate finality is necessary to maintain a fair and orderly market and to protect investors and the public interest and, hence, are also non-appealable. An appeal must be made in writing, and must be received by the Exchange within thirty (30) minutes after the person making the appeal is given the notification of the determination being appealed. Once a written appeal has been received, the counterparty to the trade that is the subject of the appeal will be notified of the appeal and both parties shall be able to submit any additional supporting written information up until the time the appeal is considered by the Exchange Review Council. Either party to a disputed trade may request the written information provided by the other party during the appeal process. An appeal to the Exchange Review Council shall not operate as a stay of the determination being appealed, and the scope of the appeal shall be limited to trades which the person making the appeal is a party.

Once a party has appealed a determination to the Exchange Review Council, the determination shall be reviewed and a decision rendered, unless (i) both parties to the transaction agree to withdraw the appeal prior to the time a decision is rendered by the Exchange Review Council, or (ii) the party filing the appeal withdraws its appeal prior to the notification of counterparties. The Exchange Review Council panel shall review the facts and render a decision as soon as practicable, but generally on the same trading day as the execution(s) under review. On requests for appeal received between 3:00 ET and the close of trading in the After Hours Trading Session, a decision will be rendered as soon as practicable, but in no case later than the trading day following the date of the execution under review. Upon consideration of the record, and after such hearings as it may in its discretion order, the Exchange Review Council, pursuant to the standards set forth in this Rule, shall affirm, modify, reverse, or remand the determination.

(2) The panel shall consist of three or more members of the Exchange Review Council, provided that no more than 50 percent of the members of any panel are directly engaged in market making activity or employed by a member organization whose revenues from market making activity exceed ten percent of its total revenues. In no case shall an Exchange Review Council Panel include a person affiliated with a party to the trade in question.

(3) The decision of the Exchange Review Council pursuant to an appeal, or a determination by an Exchange official that is not appealed, shall be final and binding upon all parties and shall constitute final action by the Exchange on the matter in issue. Any determination by an Exchange official pursuant to paragraph (a) or (b) or any decision by the Exchange Review Council pursuant to paragraph (c) shall be rendered without prejudice as to the rights of the parties to the transaction to submit their dispute to arbitration.

(d) Communications

(1) All materials submitted to the Exchange or the Exchange Review Council pursuant to this Rule shall be submitted in writing within the time parameters specified herein via the online complaint form available on the Exchange's website, facsimile, or such other telecommunications procedures as the Exchange may announce from time to time in an Equity Trader Alert. Materials shall be deemed received at the time indicated by the telecommunications equipment (e.g., facsimile machine or computer) receiving the materials. The Exchange, in its sole and absolute discretion, reserves the right to reject or accept any material that is not received within the time parameters specified herein. All times stated in this Rule are Eastern Time.

(2) The Exchange shall provide affected parties with prompt notice of filings and determinations under this Rule via facsimile machine, electronic mail, telephone (including voicemail), press release, system status, web posting or any other method reasonably expected to provide rapid notice to many market participants. During periods of high volatility and large numbers of requests for clearly erroneous review, the Exchange may streamline the notification process to expedite the adjudicatory review in such manner as the Exchange may announce from time to time by Equity Trader Alert.

(e) Fees

(1) Filing Fees

No fee shall be assessed to a member organization for filing two or fewer unsuccessful clearly erroneous complaints pursuant to paragraph (a)(2) during a calendar month. A member organization shall be assessed a fee of $250.00 for each additional unsuccessful complaint filed thereafter during the calendar month. An unsuccessful complaint is one in which the Exchange does not break any of the trades included in the complaint. Each security filed on is considered a separate complaint. In cases where the member organization files on multiple securities at the same time, the Exchange calculates the fee separately for each security depending upon whether the Exchange breaks any trades filed on by the member organization in that security. Adjustments or voluntary breaks negotiated by the Exchange to trades executed at prices that meet the Percentage Parameters or Numerical Guidelines set forth in (a)(2)(C)(2) count as breaks by the Exchange for purposes of this paragraph. A member organization for purposes of this paragraph (e)(1) is defined by each unique broker Web CRD Number. All market participant identifiers associated with that Web CRD Number shall be included when calculating the number of unsuccessful clearly erroneous complaints for that member organization during the calendar month. No fee pursuant to this paragraph (e)(1) shall be assessed for a complaint that is (A) successful, where the final decision by the Exchange (including after appeal, if any) is to break at least one of the trades filed on by the member organization, (B) not timely filed under the parameters in paragraph (a)(2)(A), (C) withdrawn by the complainant within five (5) minutes of filing and before the Exchange has performed any substantial work on the complaint, or (D) adjudicated by the Exchange on its own motion under Equity 4, Rule 3312(b).

(2) Appeal Fees

The party initiating an appeal shall be assessed a $500.00 fee if the Exchange Review Council upholds the decision of the Exchange official.

(3) Fees Charged By Another Market Center

In instances where the Exchange, on behalf of a member organization, requests a determination by another market center that a transaction is clearly erroneous, the Exchange will pass any resulting charges through to the relevant member organization.

(f) Refusal to Abide by Rulings of an Exchange Official or the Exchange Review Council

It shall be considered conduct inconsistent with just and equitable principles of trade for any member organization to refuse to take any action that is necessary to effectuate a final decision of an Exchange official or the Exchange Review Council under this Rule.

(g) Transactions Occurring Outside of LULD Plan Price Bands. If as a result of an Exchange technology or systems issue any transaction occurs outside of the applicable Price Bands disseminated pursuant to the LULD Plan, a Senior Official of the Exchange, acting on his or her own motion or at the request of a third party, shall review and declare any such trades null and void. Absent extraordinary circumstances, any such action of the Senior Official of the Exchange shall be taken in a timely fashion, generally within thirty (30) minutes of the detection of the erroneous transaction. When extraordinary circumstances exist, any such action of the Senior Official of the Exchange must be taken by no later than the start of Market Hours on the trading day following the date on which the execution(s) under review occurred. Each Member involved in the transaction shall be notified as soon as practicable by the Exchange, and the party aggrieved by the action may appeal such action in accordance with the provisions of paragraph (c) above. In the event that a single plan processor experiences a technology or systems issue that prevents the dissemination of Price Bands, the Exchange will make the determination of whether to nullify transactions based on paragraph (a)(2)(C)(1)(ii) above.

(h) Multi-Day Event . A series of transactions in a particular security on one or more trading days may be viewed as one event if all such transactions were effected based on the same fundamentally incorrect or grossly misinterpreted issuance information resulting in a severe valuation error for all such transactions (the "Event"). An Officer of the Exchange or senior level employee designee, acting on his or her own motion, shall take action to declare all transactions that occurred during the Event null and void not later than the start of trading on the day following the last transaction in the Event. If trading in the security is halted before the valuation error is corrected, an Officer of the Exchange or senior level employee designee shall take action to declare all transactions that occurred during the Event null and void prior to the resumption of trading. Notwithstanding the foregoing, no action can be taken pursuant to this paragraph with respect to any transactions that have reached settlement date or that result from an initial public offering of a security. To the extent transactions related to an Event occur on one or more other market centers, the Exchange will promptly coordinate with such other market center(s) to ensure consistent treatment of the transactions related to the Event, if practicable. Any action taken in connection with this paragraph will be taken without regard to the Percentage Parameters or Numerical Guidelines set forth in this Rule. Each Member involved in a transaction subject to this paragraph shall be notified as soon as practicable by the Exchange, and the party aggrieved by the action may appeal such action in accordance with the provisions of paragraph (c) above.

(i) Trading Halts. In the event of any disruption or malfunction in the operation of the electronic communications and trading facilities of the Exchange, another market center or responsible single plan processor in connection with the transmittal or receipt of a regulatory trading halt, suspension or pause, an Officer of the Exchange or senior level employee designee, acting on his or her own motion, shall nullify any transaction in a security that occurs after the primary listing market for such security declares a regulatory trading halt, suspension or pause with respect to such security and before such regulatory trading halt, suspension or pause with respect to such security has officially ended according to the primary listing market. In addition, in the event a regulatory trading halt, suspension or pause is declared, then prematurely lifted in error and is then re-instituted, an Officer of the Exchange or senior level employee designee shall nullify transactions that occur before the official, final end of the halt, suspension or pause according to the primary listing market. Any action taken in connection with this paragraph shall be taken in a timely fashion, generally within thirty (30) minutes of the detection of the erroneous transaction and in no circumstances later than the start of the Regular Market Session on the trading day following the date of execution(s) under review. Any action taken in connection with this paragraph will be taken without regard to the Percentage Parameters or Numerical Guidelines set forth in this Rule. Each Member involved in a transaction subject to this paragraph shall be notified as soon as practicable by the Exchange, and the party aggrieved by the action may appeal such action in accordance with the provisions of paragraph (c) above.

Adopted Jan. 22, 2021 (SR-Phlx-2021-04); amended April 14, 2021 (SR-Phlx-2021-23); amended October 8, 2021 (SR-Phlx-2021-61); amended Apr. 18, 2022 (SR-Phlx-2022-19); amended Jul. 19, 2022 (SR-Phlx-2022-31); amended Sep. 20, 2022 (SR-Phlx-2022-36), operative Oct. 1, 2022.

(a) Order Routing Process

(1) The Order Routing Process shall be available to Participants from 8:00 a.m. until 5:00 p.m. Eastern Time, and shall route orders as described below. All routing of orders shall comply with Rule 611 of Regulation NMS under the Act.

(A) The System provides a variety of routing options. Routing options may be combined with all available order types and times-in-force, with the exception of order types and times-in-force whose terms are inconsistent with the terms of a particular routing option. The System will consider the quotations only of accessible markets. The term "System routing table" refers to the proprietary process for determining the specific trading venues to which the System routes orders and the order in which it routes them. The Exchange reserves the right to maintain a different System routing table for different routing options and to modify the System routing table at any time without notice. The System routing options are:

(i) - (ii) Reserved.

(iii) PSTG is a routing option under which orders check the System for available shares and simultaneously route the remaining shares to destinations on the System routing table. If shares remain unexecuted after routing, they are posted on the book. Once on the book, should the order subsequently be locked or crossed by another accessible market center, the System shall route the order to the locking or crossing market center. PSKN is a form of PSTG in which the entering firm instructs the System to bypass any market centers included in the PSTG System routing table that are not posting Protected Quotations within the meaning of Regulation NMS.

(iv) PSCN is a routing option under which orders check the System for available shares and simultaneously route the remaining shares to destinations on the System routing table. If shares remain unexecuted after routing, they are posted on the book. Once on the book, should the order subsequently be locked or crossed by another market center, the System will not route the order to the locking or crossing market center. PSKP is a form of PSCN in which the entering firm instructs the System to bypass any market centers included in the PSCN System routing table that are not posting Protected Quotations within the meaning of Regulation NMS.

(v) PTFY is a routing option under which orders check the System for available shares only if so instructed by the entering firm and are thereafter routed to destinations on the System routing table. If shares remain un-executed after routing, they are posted to the book. Once on the book, should the order subsequently be locked or crossed by another market center, the System will not route the order to the locking or crossing market center.

(vi) PMOP is a routing option under which orders route only to Protected Quotations and only for displayed size. If shares remain unexecuted after routing, they are posted to the book. Once on the book, should the order subsequently be locked or crossed by another market center, the System will not route the order to the locking or crossing market center.

(vii) PCRT is a routing option under which orders route to the Nasdaq BX Equities Market, check the System for available shares and then route to The Nasdaq Stock Market. If shares remain un-executed, they are posted to the book or cancelled. Once on the book, should the order subsequently be locked or crossed by another market center, the System will not route the order to the locking or crossing market center.

(viii) XDRK is a routing option under which orders check the System for available shares and simultaneously route the remaining shares to destinations on the System routing table that are not posting Protected Quotations within the meaning of Regulation NMS. If shares remain un-executed after routing, they are posted on the book. Once on the book, should the order subsequently be locked or crossed by another market center, the System will not route the order to the locking or crossing market center.

(ix) XCST is a routing option under which orders check the System for available shares and simultaneously route the remaining shares to destinations on the System routing table that are not posting Protected Quotations within the meaning of Regulation NMS and to certain, but not all, exchanges. If shares remain un-executed after routing, they are posted on the book. Once on the book, should the order subsequently be locked or crossed by another market center, the System will not route the order to the locking or crossing market center.

(x) SCAR is a routing option under which orders will check the System for available shares and simultaneously route to the Nasdaq BX Equities Market and The Nasdaq Stock Market in accordance with the System routing table. If shares remain unexecuted after routing, they are posted on the book or cancelled. Once on the book, should the order subsequently be locked or crossed by another market center, the System will not route the order to the locking or crossing market center.

(B) Priority of Routed Orders. Regardless of the routing option selected, orders sent by the System to other markets do not retain time priority with respect to other orders in the System and the System shall continue to execute other orders while routed orders are away at another market center. Once routed by the System, an order becomes subject to the rules and procedures of the destination market including, but not limited to, order cancellation. If a routed order is subsequently returned, in whole or in part, that order, or its remainder, shall receive a new time stamp reflecting the time of its return to the System.

(b) Routing Broker

(1) All routing by the System shall be performed by the Exchange's affiliated broker-dealer, Nasdaq Execution Services, LLC, which, in turn, shall route orders to

other market centers either directly or through one or more third-party unaffiliated routing broker-dealers as directed by the Exchange. The Exchange will determine the logic that provides when, how, and where orders are routed away to other exchanges. Except as provided in subparagraph (c) below, the routing broker(s) cannot change the terms of an order or the routing instructions, nor does the routing broker have any discretion about where to route an order.

(2) Nasdaq Execution Services, LLC will not engage in any business other than: (a) as an outbound router for the Exchange and (b) any other activities it may engage in as approved by the Commission.

(3) Nasdaq Execution Services, LLC shall operate as a facility, as defined in Section 3(a)(2) of the Act, of the Exchange.

(4) For purposes of SEC Rule 17d-1, the designated examining authority of Nasdaq Execution Services, LLC shall be a self-regulatory organization unaffiliated with

the Exchange or any of its affiliates. The Exchange may not use a routing broker for which the Exchange or any affiliate of the Exchange is the designated examining authority.

(5) The Exchange shall be responsible for filing with the Securities and Exchange Commission rule changes related to the operation of, and fees for services provided by, Nasdaq Execution Services, LLC and Nasdaq Execution Services, LLC shall be subject to exchange non-discrimination requirements.

(6) The books, records, premises, officers, agents, directors and employees of Nasdaq Execution Services, LLC as a facility of the Exchange shall be deemed to be the books, records, premises, officers, agents, directors and employees of the Exchange for purposes of, and subject to oversight pursuant to, the Act. The books and records of Nasdaq Execution Services, LLC as a facility of the Exchange shall be subject at all times to inspection and copying by the Commission.

(7) Use of Nasdaq Execution Services, LLC to route orders to other market centers will be optional. Parties that do not desire to use Nasdaq Execution Services, LLC must enter orders into the System as immediate-or-cancel orders or any other order type available through the System that is ineligible for routing.

(8) Nasdaq Execution Services, LLC shall establish and maintain procedures and internal controls reasonably designed to adequately restrict the flow of confidential and proprietary information between: the Exchange and its facilities (including Nasdaq Execution Services, LLC as its routing facility) and any other entity; or, where there is a routing broker, the Exchange, the Routing Facility and any routing broker, and any other entity, including any affiliate of the routing broker (and if the routing broker or any of its affiliates engages in any other business activities other than providing routing services to the Exchange, between the segment of the routing broker or affiliate that provides the other business activities and the segment of the routing broker that provides the routing services).

(c) Market Access. In addition to the Exchange Rules regarding routing to away trading centers, Nasdaq Execution Services LLC has, pursuant to Rule 15c3-5 under the Act, implemented certain tests designed to mitigate risks associated with providing the Exchange's members and member organizations with access to such away trading centers. Pursuant to the policies and procedures developed by Nasdaq Execution Services LLC to comply with Rule 15c3-5, if an order or series of orders are deemed to be violative of applicable pre-trade requirements under Rule 15c3-5, the order will be rejected prior to routing and/or Nasdaq Execution Services LLC will seek to cancel the order if it has been routed.

(d) Cancellation of Orders and Error Account

(1) The Exchange or Nasdaq Execution Services may cancel orders as either deems to be necessary to maintain fair and orderly markets if a technical or systems issue occurs at the Exchange, Nasdaq Execution Services, or a routing destination. The Exchange or Nasdaq Execution Services shall provide notice of the cancellation to affected members as soon as practicable.

(2) Nasdaq Execution Services shall maintain an error account for the purpose of addressing positions that result from a technical or systems issue at Nasdaq Execution Services, the Exchange, a routing destination, or a non-affiliate third-party Routing Broker that affects one or more orders ("error positions").

(A) For purposes of this Equity 4, Rule 3315(d), an error position shall not include any position that results from an order submitted by a member to the Exchange that is executed on the Exchange and automatically processed for clearance and settlement on a locked-in basis.

(B) Except as provided in Equity 4, Rule 3315(d)(2)(C), Nasdaq Execution Services shall not (i) accept any positions in its error account from an account of a member, or (ii) permit any member to transfer any positions from the member's account to Nasdaq Execution Services' error account.

(C) If a technical or systems issue results in the Exchange not having valid clearing instructions for a member to a trade, Nasdaq Execution Services may assume that member's side of the trade so that the trade can be automatically processed for clearance and settlement on a locked-in basis.

(3) In connection with a particular technical or systems issue, Nasdaq Execution Services or the Exchange shall either (i) assign all resulting error positions to members in accordance with subparagraph (A) below, or (ii) have all resulting error positions liquidated in accordance with subparagraph (B) below. Any determination to assign or liquidate error positions, as well as any resulting assignments, shall be made in a nondiscriminatory fashion.

(A) Nasdaq Execution Services or the Exchange shall assign all error positions resulting from a particular technical or systems issue to the members affected by that technical or systems issue if Nasdaq Execution Services or the Exchange:

(i) determines that it has accurate and sufficient information (including valid clearing information) to assign the positions to all of the members affected by that technical or systems issue;

(ii) determines that it has sufficient time pursuant to normal clearance and settlement deadlines to evaluate the information necessary to assign the positions to all of the members affected by that technical or systems issue; and

(iii) has not determined to cancel all orders affected by that technical or systems issue in accordance with subparagraph (d)(1) above.

(B) If Nasdaq Execution Services or the Exchange is unable to assign all error positions resulting from a particular technical or systems issue to all of the affected members in accordance with subparagraph (A) above, or if Nasdaq Execution Services or the Exchange determines to cancel all orders affected by the technical or systems issue in accordance with subparagraph (d)(1) above, then Nasdaq Execution Services shall liquidate the error positions as soon as practicable. Nasdaq Execution Services shall:

(i) provide complete time and price discretion for the trading to liquidate the error positions to a third-party broker-dealer and shall not attempt to exercise any influence or control over the timing or methods of such trading; and

(ii) establish and enforce policies and procedures that are reasonably designed to restrict the flow of confidential and proprietary information between the third-party broker-dealer and Nasdaq Execution Services/the Exchange associated with the liquidation of the error positions.

(4) Nasdaq Execution Services and the Exchange shall make and keep records to document all determinations to treat positions as error positions and all determinations for the assignment of error positions to members or the liquidation of error positions, as well as records associated with the liquidation of error positions through the third-party broker-dealer.

Adopted Jan. 22, 2021 (SR-Phlx-2021-04).

(a) Tick Size Pilot Program

(1) Definitions.

(A) "Plan" means the Tick Size Pilot Plan Submitted to the Securities and Exchange Commission Pursuant to Rule 608(a)(3) of Regulation NMS under the Exchange Act.

(B) "Pilot Test Groups" means the three test groups established under the Plan, consisting of 400 Pilot Securities each, which satisfy the respective criteria established by the Plan for each such test group.

(C) Reserved.

(D) "Trade-at Intermarket Sweep Order" means a limit order for a Pilot Security that meets the following requirements:

(i) When routed to a Trading Center, the limit order is identified as a Trade-at Intermarket Sweep Order; and

(ii) Simultaneously with the routing of the limit order identified as a Trade-at Intermarket Sweep Order, one or more additional limit orders, as necessary, are routed to execute against the full size of any protected bid, in the case of a limit order to sell, or the full displayed size of any protected offer, in the case of a limit order to buy, for the Pilot Security with a price that is better than or equal to the limit price of the limit order identified as a Trade-at Intermarket Sweep Order. These additional routed orders also must be marked as Trade-at Intermarket Sweep Orders or Intermarket Sweep Orders.

(E) All capitalized terms not otherwise defined in this Rule shall have the meanings set forth in the Plan, Regulation NMS under the Exchange Act, or Exchange rules, as applicable.

(2) Exchange Participation in the Plan. The Exchange is a Participant in, and subject to the applicable requirements of, the Plan, which establishes a Tick Size Pilot Program that will allow the Securities and Exchange Commission, market participants, and the public to study and assess the impact of increment conventions on the liquidity and trading of the common stocks of small capitalization companies.

(3) Member Organization Compliance. Member organizations shall establish, maintain and enforce written policies and procedures that are reasonably designed to comply with the applicable requirements of the Plan.

(4) Exchange Compliance with the Plan. Exchange systems will not display, quote or trade in violation of the applicable quoting and trading requirements for a Pilot Security specified in the Plan and this Rule, unless such quotation or transaction is specifically exempted under the Plan.

(5) Pilot Securities That Drop Below $1.00 during the Pilot Period. If the price of a Pilot Security drops below $1.00 during regular trading on any given business day, such Pilot Security will continue to be subject to the Plan and the requirements enumerated in (c)(1)-(3) below and will continue to trade in accordance with such Rules as if the price of the Pilot Security had not dropped below $1.00. However, if the Closing Price of a Pilot Security on any given business day is below $1.00, such Pilot Security will be moved out of its respective Pilot Test Group into the Control Group, and may then be quoted and traded at any price increment that is currently permitted by Exchange rules for the remainder of the Pilot Period. Notwithstanding anything contained herein to the contrary, at all times during the Pilot Period, Pilot Securities (whether in the Control Group or any Pilot Test Group) will continue to be subject to the requirements contained in Paragraph (b).

(b) Compliance with Data Collection Requirements

(1) Policies and Procedures Requirement. A Member that operates a Trading Center shall establish, maintain and enforce written policies and procedures that are reasonably designed to comply with the data collection and transmission requirements of Items I and II of Appendix B of the Plan, and a Member that is a Market Maker shall establish, maintain and enforce written policies and procedures that are reasonably designed to comply with the data collection and transmission requirements of Item IV of Appendix B of the Plan and Item I of Appendix C of the Plan.

(2) The Exchange shall collect and transmit to the SEC the data described in Items I and II of Appendix B of the Plan relating to trading activity in Pre-Pilot Securities and Pilot Securities on a Trading Center operated by the Exchange. The Exchange shall transmit such data to the SEC in a pipe delimited format, on a disaggregated basis by Trading Center, within 30 calendar days following month end for:

(A) Each Pre-Pilot Data Collection Security for the period beginning six months prior to the Pilot Period through thirty-one days prior to the first day of the Pilot Period; and

(B) Each Pilot Security for the period beginning thirty days prior to the first day of the Pilot Period through six months after the end of the Pilot Period. The Exchange also shall make such data publicly available on the Exchange web site within 120 calendar days following month end at no charge and shall not identify the Member that generated the data.

(3) Daily Market Maker Participation Statistics Requirement

(A) A Member that is a Market Maker shall collect and transmit to their DEA data relating to Item IV of Appendix B of the Plan, with respect to activity conducted on any Trading Center in Pre-Pilot Securities and Pilot Securities in furtherance of its status as a Market Maker, including a Trading Center that executes trades otherwise than on a national securities exchange, for transactions that have settled or reached settlement date. Market Makers shall transmit such data in a format required by their DEA by 12:00 p.m. EST on T+4:

(i) For transactions in each Pre-Pilot Data Collection Security for the period beginning six months prior to the Pilot Period through thirty-one days prior to the first day of the Pilot Period; and

(ii) For transactions in each Pilot Security for the period beginning thirty days prior to the first day of the Pilot Period through six months after the end of the Pilot Period.

(B) A Member that is a Market Maker whose DEA is not a Participant to the Plan shall transmit the data collected pursuant to paragraph (3)(A) above to the Financial Industry Regulatory Authority, Inc. ("FINRA"). Market Makers shall transmit such data in a format required by FINRA by 12:00 p.m. EST on T+4 in accordance with paragraphs (3)(A)(i) and (ii) above.

(C) The Exchange shall transmit the data collected by the DEA or FINRA pursuant to paragraphs (3)(A) and (B) above relating to Market Maker activity on a Trading Center operated by the Exchange to the SEC in a pipe delimited format within 30 calendar days following month end. The Exchange shall also make such data publicly available on the Exchange web site within 120 calendar days following month end at no charge and shall not identify the Trading Center that generated the data.

(4) Market Maker Profitability

(A) A Member that is a Market Maker shall collect and transmit to their DEA the data described in Item I of Appendix C of the Plan with respect to executions on any Trading Center that have settled or reached settlement date. Market Makers shall transmit such data in a format required by their DEA by 12:00 p.m. EST on T+4 for executions during and outside of Regular Trading Hours in each:

(i) Pre-Pilot Data Collection Security for the period beginning six months prior to the Pilot Period through thirty-one days prior to the first day of the Pilot Period; and

(ii) Pilot Security for the period beginning thirty days prior to the first day of the Pilot Period through six months after the end of the Pilot Period.

(B) A Member that is a Market Maker whose DEA is not a Participant to the Plan shall transmit the data collected pursuant to paragraph (4)(A) above to FINRA. Market Makers shall transmit such data in a format required by FINRA by 12:00 p.m. EST on T+4 for executions during and outside of Regular Trading Hours in accordance with paragraphs (4)(A)(i) and (ii) above.

(C) The Exchange, as DEA, shall collect the data required by Item I of Appendix C to the Plan and paragraph (b)(4)(A) above for those Members that are Market Makers for which the Exchange is DEA, and on a monthly basis transmit such data, categorized by the Control Group and each Test Group, to the SEC in a pipe delimited format. The Exchange, as DEA, shall also make the data collected pursuant to subparagraph (4) of this Rule at paragraph (b) available to FINRA for aggregation and publication, categorized by the Control Group and each Test Group, on the FINRA website pursuant to FINRA Rules.

(5) Market Maker Registration Statistics. The Exchange shall collect and transmit to the SEC the data described in Item III of Appendix B of the Plan relating to daily Market Maker registration statistics in a pipe delimited format within 30 calendar days following month end for:

(A) For transactions in each Pre-Pilot Data Collection Security for the period beginning six months prior to the Pilot Period through the trading day immediately preceding the Pilot Period; and

(B) For transactions in each Pilot Security for the period beginning on the first day of the Pilot Period through six months after the end of the Pilot Period.

The Exchange also shall make such data publicly available on the Exchange web site within 120 calendar days following month end at no charge.

(c) Compliance with Quoting and Trading Restrictions

(1) Pilot Securities in Test Group One will be subject to the following requirement: No member organization may display, rank, or accept from any person any displayable or non-displayable bids or offers, orders, or indications of interest in increments other than $0.05. However, orders priced to trade at the midpoint of the national best bid and national best offer ("NBBO") or best protected bid and best protected offer ("PBBO") and orders entered in a Participant-operated retail liquidity program may be ranked and accepted in increments of less than $0.05. Pilot Securities in Test Group One may continue to trade at any price increment that is currently permitted by Equity 1, Section 1(k).

(2) Pilot Securities in Test Group Two shall be subject to the following requirements:

(A) No member organization may display, rank, or accept from any person any displayable or non-displayable bids or offers, orders, or indications of interest in increments other than $0.05. However, orders priced to trade at the midpoint of the NBBO or PBBO and orders entered in a Participant-operated retail liquidity program may be ranked and accepted in increments of less than $0.05.

(B) Absent any of the exceptions listed in (C) below, no member organization may execute orders in any Pilot Security in Test Group Two in price increments other than $0.05. The $0.05 trading increment will apply to all trades, including Brokered Cross Trades.

(C) Pilot Securities in Test Group Two may trade in increments less than $0.05 under the following circumstances:

(i) Trading may occur at the midpoint between the NBBO or the PBBO;

(ii) Retail Investor Orders may be provided with price improvement that is at least $0.005 better than the PBBO;

(iii) Negotiated Trades may trade in increments less than $0.05; and

(iv) Reserved.

(3) Pilot Securities in Test Group Three shall be subject to the following requirements:

(A) No member organization may display, rank, or accept from any person any displayable or non-displayable bids or offers, orders, or indications of interest in increments other than $0.05. However, orders priced to trade at the midpoint of the NBBO or PBBO and orders entered in a Participant-operated retail liquidity program may be ranked and accepted in increments of less than $0.05.

(B) Absent any of the exceptions listed in (C) below, no member organization may execute orders in any Pilot Security in Test Group Three in price increments other than $0.05. The $0.05 trading increment will apply to all trades, including Brokered Cross Trades.

(C) Pilot Securities in Test Group Three may trade in increments less than $0.05 under the following circumstances:

(i) Trading may occur at the midpoint between the NBBO or PBBO;

(ii) Retail Investor Orders may be provided with price improvement that is at least $0.005 better than the Best Protected Bid or the Best Protected Offer;

(iii) Negotiated Trades may trade in increments less than $0.05; and

(iv) Reserved.

(D) Pilot Securities in Test Group Three will be subject to the following Trade-at Prohibition:

(i) "Trade-at Prohibition" means the prohibition against executions by a Trading Center of a sell order for a Pilot Security at the price of a Protected Bid or the execution of a buy order for a Pilot Security at the price of a Protected Offer during regular trading hours.

(ii) Absent any of the exceptions listed in (iii) below, no member organization may execute a sell order for a Pilot Security in Test Group Three at the price of a Protected Bid or execute a buy order for a Pilot Security in Test Group Three at the price of a Protected Offer.

(iii) Member organizations may execute a sell order for a Pilot Security in Test Group Three at the price of a Protected Bid or execute a buy order for a Pilot Security in Test Group Three at the price of a Protected Offer if any of the following circumstances exist:

a. The order is executed as agent or riskless principal by an independent trading unit, as defined under Rule 200(f) of Regulation SHO, of a Trading Center within a member organization that has a displayed quotation as agent or riskless principal, via either a processor or an SRO Quotation Feed, at a price equal to the traded-at Protected Quotation, that was displayed before the order was received, but only up to the full displayed size of that independent trading unit's previously displayed quote;

b. The order is executed by an independent trading unit, as defined under Rule 200(f) of Regulation SHO, of a Trading Center within a member organization that has a displayed quotation for the account of that Trading Center on a principal (excluding riskless principal) basis, via either a processor or an SRO Quotation Feed, at a price equal to the traded-at Protected Quotation, that was displayed before the order was received, but only up to the full displayed size of that independent trading unit's previously displayed quote;

c. The order is of Block Size at the time of origin and may not be:

A. an aggregation of non-block orders; or

B. broken into orders smaller than Block Size prior to submitting the order to a Trading Center for execution; 

d. The order is a Retail Investor Order executed with at least $0.005 price improvement;

e. The order is executed when the Trading Center displaying the Protected Quotation that was traded at was experiencing a failure, material delay, or malfunction of its systems or equipment;

f. The order is executed as part of a transaction that was not a "regular way" contract;

g. The order is executed as part of a single-priced opening, reopening, or closing transaction on the Exchange;

h. The order is executed when a Protected Bid was priced higher than a Protected Offer in the Pilot Security;

i. The order is identified as a Trade-at Intermarket Sweep Order;

j. The order is executed by a Trading Center that simultaneously routed Trade-at Intermarket Sweep Orders or Intermarket Sweep Orders to execute against the full displayed size of the Protected Quotation that was traded at;

k. The order is executed as part of a Negotiated Trade;

l. The order is executed when the Trading Center displaying the Protected Quotation that was traded at had displayed, within one second prior to execution of the transaction that constituted the Trade-at, a Best Protected Bid or Best Protected Offer, as applicable, for the Pilot Security with a price that was inferior to the price of the Trade-at transaction;

m. The order is executed by a Trading Center which, at the time of order receipt, the Trading Center had guaranteed an execution at no worse than a specified price (a "stopped order"), where:

A. The stopped order was for the account of a customer;

B. The customer agreed to the specified price on an order-by-order basis; and

C. The price of the Trade-at transaction was, for a stopped buy order, equal to or less than the National Best Bid in the Pilot Security at the time of execution or, for a stopped sell order, equal to or greater than the National Best Offer in the Pilot Security at the time of execution, as long as such order is priced at an acceptable increment;

n. The order is for a fractional share of a Pilot Security, provided that such fractional share order was not the result of breaking an order for one or more whole shares of a Pilot Security into orders for fractional shares or was not otherwise effected to evade the requirements of the Trade-at Prohibition or any other provisions of the Plan; or 

o. The order is to correct a bona fide error, which is recorded by the Trading Center in its error account. A bona fide error is defined as:

A. The inaccurate conveyance or execution of any term of an order including, but not limited to, price, number of shares or other unit of trading; identification of the security; identification of the account for which securities are purchased or sold; lost or otherwise misplaced order tickets; short sales that were instead sold long or vice versa; or the execution of an order on the wrong side of a market;

B. The unauthorized or unintended purchase, sale, or allocation of securities, or the failure to follow specific client instructions;

C. The incorrect entry of data into relevant systems, including reliance on incorrect cash positions, withdrawals, or securities positions reflected in an account; or

D. A delay, outage, or failure of a communication system used to transmit market data prices or to facilitate the delivery or execution of an order.

(iv) No member organization shall break an order into smaller orders or otherwise effect or execute an order to evade the requirements of the Trade-at Prohibition of this Rule or any other provisions of the Plan.

(d) Operation of Order Types and Order Attributes

This section sets forth PSX's specific procedures for handling, executing, re-pricing and displaying of certain Order Types and Order Attributes applicable to Pilot Securities. Unless otherwise indicated, this section applies to orders in all three Test Group Pilot Securities.

(1) All Order Types. Any Order Type in a security of any of the Test Groups that requires a price and does not otherwise qualify for an exception, will not be accepted if it is in a minimum price increment other than $0.05. This minimum price increment applies to repricing and rounding by the System, unless otherwise noted below.

Subject to the provisions below, if the entered limit price of an Order in a Test Group Three Pilot Security, entered through RASH or FIX, locked or crossed a Protected Quotation and the NBBO changes so that the Order can be ranked closer to its original entered limit price, the price of the Order will be adjusted repeatedly in accordance with changes to the NBBO.

(2) Price to Comply Order. A Price to Comply Order in a Test Group Pilot Security will operate as described in Equity 4, Rule 3301A(b)(1) except as provided under this paragraph. If a Price to Comply Order for a Test Group Three Pilot Security is partially executed upon entry and the remainder would lock a Protected Quotation of another market center, the unexecuted portion of the Order will be cancelled. If the Order is not executable against any previously posted orders on the Exchange Book, and the limit price of a buy (sell) Price to Comply Order in a Test Group Three Pilot Security would lock or cross a Protected Quotation of another market center, the Order will display at one minimum price increment below (above) the Protected Quotation, and the Order will be ranked on the Exchange Book at the current midpoint of NBBO.

A Price to Comply Order in a Test Group Three Pilot Security entered through OUCH or FLITE may be adjusted in the following manner after initial entry and posting to the Exchange Book:

• If entered at a price that locked a Protected Quotation, and if the NBBO changes such that it can be ranked and displayed at the price of the Protected Quotation that it locked, the Price to Comply Order will be adjusted to rank and display at its original entered limit price.

• If entered at a price that crossed a Protected Quotation, and if the NBBO changes such that it can be ranked at the price of the Protected Quotation it crossed, the Price to Comply Order, based on the participant's choice, may either be (i) cancelled or (ii) adjusted to rank at the price of the Protected Quotation it crossed upon entry with its displayed price remaining unchanged.

• If, after being posted on the Exchange Book, the non-displayed price of a Price to Comply Order becomes locked or crossed by a Protected Quotation due to a change in the NBBO, or if the Price to Comply Order is at an impermissible price under Regulation NMS or the Plan and it cannot otherwise be adjusted as above, the Price to Comply Order will be cancelled.

(3) Non-Displayed Order. A Non-Displayed Order in a Test Group Pilot Security will operate as described in Equity 4, Rule 3301A(b)(3) except as provided under this paragraph. A resting Non-Displayed Order in a Test Group Three Pilot security cannot execute at the price of a Protected Quotation of another market center unless the incoming Order otherwise qualifies for an exception to the Trade-at prohibition provided under subparagraph (c)(3)(D) of this Rule.  If the limit price of a buy (sell) Non-Displayed Order in a Test Group Three Pilot Security would lock or cross a Protected Quotation of another market center, the Order will be ranked on the Exchange Book at either one minimum price increment below (above) the National Best Offer (National Best Bid) or at the midpoint of the NBBO, whichever is higher (lower). If a resting Non-Displayed Order in a Test Group Three Pilot Security entered through RASH or FIX becomes locked or crossed by a Protected Quotation due to a change in the NBBO, or if the Non-Displayed Order is at an impermissible price under Regulation NMS or the Plan, the Non- Displayed Order will be repriced to a price that is at either one minimum price increment below (above) the National Best Offer (National Best Bid) or at the midpoint of the NBBO, whichever is higher (lower) and will receive a new timestamp.

A Non-Displayed Order in a Test Group Three Pilot Security entered through OUCH or FLITE may be adjusted in the following manner after initial entry and posting to the Exchange Book:

• If entered at a price that locked a Protected Quotation, and if the NBBO changes such that it can be ranked at the price of the Protected Quotation that it locked, the Non-Displayed Order will be adjusted to rank at its original entered limit price.

• If entered at a price that crossed a Protected Quotation, and if the NBBO changes such that it can be ranked at the price of the Protected Quotation it crossed, the Order, based on the Participant's choice, may either be (i) cancelled or (ii) adjusted to rank at the price of the Protected Quotation it crossed.

• If entered at a price that locked or crossed a Protected Quotation, and if the NBBO changes such that it cannot be ranked at the price of the Protected Quotation it locked or crossed but can be ranked closer to its original limit price, the Non-Displayed Order will be adjusted to the new midpoint of the NBBO.

• If, after being posted on the Exchange Book, the Non-Displayed Order becomes locked or crossed by a Protected Quotation due to a change in the NBBO, or if the Non-Displayed Order is at an impermissible price under Regulation NMS or the Plan and it cannot otherwise be adjusted as above, the Non-Displayed Order will be cancelled.

(4) Post-Only Order. A Post-Only Order in a Test Group Pilot Security will operate as described in Equity 4, Rule 3301A(b)(4) except as provided under this paragraph. For orders that are not attributable, if the limit price of a buy (sell) Post-Only Order in a Test Group Three Pilot Security would lock or cross a Protected Quotation of another market center, the Order will display at one minimum price increment below (above) the Protected Quotation, and the Order will be ranked on the Exchange Book at the current midpoint of the NBBO. 

A Non-Attributable Post-Only Order in a Test Group Three Pilot Security entered through OUCH or FLITE may be adjusted in the following manner after initial entry and posting to the Exchange Book:

• If entered at a price that locked a Protected Quotation, and if the NBBO changes such that it can be ranked and displayed at the price of the Protected Quotation that it locked, the Post-Only Order will be adjusted to rank and display at its original entered limit price.

• If entered at a price that crossed a Protected Quotation, and if the NBBO changes such that it can be ranked at the price of the Protected Quotation it crossed, the Post-Only Order, based on the Participant's choice, may either be

(i) cancelled or (ii) adjusted to rank at the price of the Protected Quotation it crossed upon entry with its displayed price remaining unchanged.

• If, after being posted on the Exchange Book, the non-displayed price of a resting Post-Only Order becomes locked or crossed by a Protected Quotation due to a change in the NBBO, or if the Post-Only Order is at an impermissible price under Regulation NMS or the Plan and it cannot otherwise be adjusted as above, the Post-Only Order will be cancelled.

(5) Market Maker Peg Order. A Market Maker Peg Order in a Test Group Pilot Security will operate as described in Equity 4, Rule 3301A(b)(5) except as provided under this paragraph. The displayed price of a Market Maker Peg

Order in a Test Group Pilot Security will be rounded up (down) to the nearest minimum price increment for bids (offers), if it would otherwise display at an increment smaller than the minimum price increment. For example, if the NBB is $10.05 and NBO is $10.15, and the Designated Percentage (as defined in Equity 2, Section 5) is 28%, the displayed price of a Market Maker Peg Order to buy 100 shares of a Test Group Pilot Security would be $7.25 (i.e., $10.05 - ($10.05 x 0.28) = $7.236, rounded up to $7.25). Using the same market, but with a Market Maker Peg Order to sell 100 shares, the displayed price of the Order would be $12.95 (i.e., $10.15 + ($10.15 x 0.28) = $12.992, rounded down to $12.95).

(6) Midpoint Peg Post-Only Order. A Midpoint Peg Post-Only Order in a Test Group Pilot Security will operate as described in Equity 4, Rule 3301A(b)(6) except as provided under this paragraph. A Midpoint Peg Post-Only Order in a Test Group Pilot Security may execute at the midpoint of the NBBO in an increment other than the minimum price increment.

(7) Midpoint Pegging. An Order with Midpoint Pegging in a Test Group Pilot Security will operate as described in Equity 4, Rule 3301B(d) except as provided under this paragraph. An order in a Test Group Pilot Security with Midpoint Pegging may execute at the midpoint of the NBBO in an increment other than the minimum price increment.

(8) Reserve Size. An Order with Reserve Size in a Test Group Pilot Security will operate as described in Equity 4, Rule 3301B(h) except as provided under this paragraph. A resting Order in a Test Group Three Pilot Security with a Reserve Size (either a Price to Comply Order or a Price to Display Order through RASH or FIX) may not execute the non-displayed Reserve Size at the price of a Protected Quotation of another market center unless the incoming Order otherwise qualifies for an exception to the Trade-at prohibition provided under Equity 4, Rule 3317(c)(3)(D). If an Order with Reserve Size for a Test Group Three Pilot Security is partially executed upon entry and the remainder would lock a Protected Quotation of another market center, the unexecuted portion of the Order will be cancelled. If the Order is not executable against any previously posted orders on the Exchange Book, and the limit price of a buy (sell) Price to Comply Order with Reserve Size in a Test Group Three Pilot Security would lock or cross a Protected Quotation of another market center, the displayed portion of the Order will display at one minimum price increment below (above) the Protected Quotation, and the displayed and non-displayed portions of the Order will be ranked on the Exchange Book at the current midpoint of the NBBO. If the Order is not executable against any previously posted orders on the Exchange Book, and the limit price of a buy (sell) Price to Display Order with Reserve Size in a Test Group Three Pilot Security would lock or cross a Protected Quotation of another market center, the displayed portion of the Order will be display and be ranked at one minimum price increment below (above) the Protected Quotation, and the non-displayed portion of the Order will be ranked on the Exchange Book at the current midpoint of the NBBO. If after being posted to the Exchange Book, the NBBO changes so that the Order with Reserve Size in a Test Group Three Pilot Security would no longer be executable at its ranked price due to the requirements of Regulation NMS or the Plan, the order will be adjusted in the same manner as described above.

(9) Good-till-Cancelled. An Order with a Time-in-Force of Good-till-Cancelled in a Test Group Pilot Security will operate as described in Equity 4, Rule 3301B(a)(3) except as provided under this paragraph. An order in a Test Group Security with a Good-till-Cancelled Time-in-Force that is adjusted pursuant to Equity 4, Rule 3311(b) will be adjusted based on a $0.05 increment.

Commentary: 

.01 The terms used in this Rule shall have the same meaning as provided in the Plan, unless otherwise specified.

.02 For purposes of the reporting requirement in Appendix B.II.(n), a Trading Center shall report "Y" to their DEA where it is relying upon the Retail Investor Order exception to Test Groups Two and Three, and "N" in all other instances.

.03 For purposes of Appendix B.I, the field "Affected by Limit-Up Limit-Down bands" shall be included. A Trading Center shall report a value of "Y" to their DEA when the ability of an order to execute has been affected by the Limit-Up Limit-Down (LULD) bands in effect at the time of order receipt. A Trading Center shall report a value of "N" to their DEA when the ability of an order to execute has not been affected by the LULD bands in effect at the time of order receipt. For purposes of Appendix B.I, the Participants shall classify all orders in Pilot and Pre-Pilot Securities that may trade in a foreign market as: (1) fully executed domestically or (2) fully or partially executed on a foreign market. For purposes of Appendix B.II, the Participants shall classify all orders in Pilot and Pre-Pilot Securities that may trade in a foreign market as: (1) directed to a domestic venue for execution; (2) may only be directed to a foreign venue for execution; or (3) fully or partially directed to a foreign venue at the discretion of the Member.

.04 (a) For purposes of Appendix B.I.a(14), B.I.a(15), B.I.a(21) and B.I.a(22), the time ranges shall be changed as follows:

(1) Appendix B.I.a(14A): The cumulative number of shares of orders executed from 100 microseconds to less than 1 millisecond after the time of order receipt;

(2) Appendix B.I.a(15): The cumulative number of shares of orders executed from 1millisecond to less than 100 milliseconds after the time of order receipt;

(3) Appendix B.I.a(21A): The cumulative number of shares of orders canceled from 100 microseconds to less than 1 millisecond after the time of order receipt; and

(4) Appendix B.I.a(22): The cumulative number of shares of orders canceled from 1 millisecond to less than 100 milliseconds after the time of order receipt.

(b) For purposes of Appendix B.I.a(21) through B.I.a(27), unexecuted Immediate or Cancel orders shall be categorized separately irrespective of the duration of time after order receipt.

.05 For purposes of Appendix B.I.a(31)-(33), the relevant measurement is the time of order receipt.

.06 For purposes of Appendix B, the following order types and numbers shall be included and assigned the following numbers: "not held" orders (18); clean cross orders (19); auction orders (20); and orders that cannot otherwise be classified, including orders received when the NBBO is crossed (21); and limit order priced more than $0.10 away from the NBBO (22). For purposes of order types 12-14 in Appendix B, such order types shall include all orders and not solely "resting" orders.

.07 A Member shall not be deemed a Trading Center for purposes of Appendix B of the Plan where that Member only executes orders otherwise than on a national securities exchange for the purpose of: (i) correcting a bona fide error related to the execution of a customer order; (ii) purchases a security from a customer at a nominal price solely for purposes of liquidating the customer's position; or (iii) completing the fractional share portion of an order.

.08 A Trading Center shall begin the data collection required pursuant to Appendix B.I.a(1) through B.II.(y) of the Plan and Item I of Appendix C of the Plan on April 4, 2016. The requirement that the Exchange or their DEA provide information to the SEC within 30 days following month end pursuant to Appendix B and C of the Plan shall commence at the beginning of the Pilot Period. Notwithstanding the provisions of paragraphs (b)(2)(B), (b)(3)(C), and (b)(5) of this Rule, with respect to data for the Pre- Pilot and Pilot Period, the requirement that the Exchange or DEA make Appendix B data publicly available on the Exchange's or DEA's web site shall commence on August 31, 2017. Notwithstanding the provisions of paragraph (b)(4) of this Rule, the Exchange or DEA shall make Appendix C data for the Pre-Pilot Period through January 2017 publicly available on the Exchange or DEA's web site by February 28, 2017.

.09 For purposes of Appendix B.IV, the count of the number of Market Makers used in the calculation of share (trade) participation shall be added to each category. For purposes of Appendix B.IV(b) and (c), share participation and trade participation shall be calculated by using a total count instead of a share-weighted average or a trade-weighted average. For purposes of Appendix B, B.IV(d) (cross-quote share (trade) participation), (e) (inside-the-quote share (trade) participation), (f) (at-the-quote share (trade) participation), and (g) (outside-the-quote share (trade) participation), shall be calculated by reference to the National Best Bid or National Best Offer in effect immediately prior to the trade.

.10 For purposes of Item I of Appendix C, the Participants shall calculate daily Market Maker realized profitability statistics for each trading day on a daily last in, first out (LIFO) basis using reported trade price and shall include only trades executed on the subject trading day. The daily LIFO calculation shall not include any positions carried over from previous trading days. For purposes of Item I.c of Appendix C, the Participants shall calculate daily Market Maker unrealized profitability statistics for each trading day on an average price basis. Specifically, the Participants must calculate the volume weighted average price of the excess (deficit) of buy volume over sell volume for the current trading day using reported trade price. The gain (loss) of the excess (deficit) of buy volume over sell volume shall be determined by using the volume weighted average price compared to the closing price of the security as reported by the primary listing exchange. In calculating unrealized trading profits, the Participant also shall report the number of excess (deficit) shares held by the Market Maker, the volume weighted average price of that excess (deficit), and the closing price of the security as reported by the primary listing exchange used in reporting unrealized profit.

.11 "Pre-Pilot Data Collection Securities" are the securities designated by the Participants for purposes of the data collection requirements described in Items I, II and IV of Appendix B and Item I of Appendix C of the Plan for the period beginning six months prior to the Pilot Period through thirty-one days prior to the Pilot Period. The Participants shall compile the list of Pre-Pilot Data Collection Securities by selecting all NMS stocks with a market capitalization of $5 billion or less, a Consolidated Average Daily Volume (CADV) of 2 million shares or less and a closing price of $1 per share or more. The market capitalization and the closing price thresholds shall be applied to the last day of the Pre- Pilot measurement period, and the CADV threshold shall be applied to the duration of the Pre-Pilot measurement period. The Pre-Pilot measurement period shall be the three calendar months ending on the day when the Pre-Pilot Data Collection Securities are selected. The Pre-Pilot Data Collection Securities shall be selected thirty days prior to the commencement of the six-month Pre-Pilot Period.

.12 This Rule shall be in effect during a pilot period to coincide with the pilot period for the Plan (including any extensions to the pilot period for the Plan).

.13 For purposes of qualifying for the Block Size exception under paragraph (c)(3)(D)(iii) of this Rule, the Order must have a size of 5,000 shares or more and the resulting execution upon entry must have a size of 5,000 shares or more in aggregate.

Adopted Jan. 22, 2021 (SR-Phlx-2021-04).