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###### Securities and Exchange Commission

          - [Release No. 34-98360; File No. SR-MEMX-2023-21]

                    Pursuant to Section 19(b)(1) [1]                                          of the Securities Exchange Act of 1934 (the “Act”) [2]                                          and Rule 19b-4 thereunder,[3]                                          notice is hereby given that, on August 31, 2023, MEMX LLC (“MEMX” or the “Exchange”) filed with the Securities and Exchange Commission (the “Commission”) the proposed rule change as described in Items I, II and III below, which Items have been prepared by the Exchange. The Commission is publishing this notice to solicit comments on the proposed rule change from interested persons.                

## I. Self-Regulatory Organization's Statement of the Terms of Substance of the Proposed Rule Change

                    The Exchange is filing with the Commission a proposed rule change to amend the Exchange's fee schedule applicable to Members [4]                                          (the “Fee Schedule”) pursuant to Exchange Rules 15.1(a) and (c). The Exchange proposes to implement the changes to the Fee Schedule pursuant to this proposal immediately. The text of the proposed rule change is provided in Exhibit 5.                

## II. Self-Regulatory Organization's Statement of the Purpose of, and the Statutory Basis for, the Proposed Rule Change

In its filing with the Commission, the Exchange included statements concerning the purpose of and basis for the proposed rule change and discussed any comments it received on the proposed rule change. The text of these statements may be examined at the places specified in Item IV below. The Exchange has prepared summaries, set forth in sections A, B, and C below, of the most significant aspects of such statements.

### A. Self-Regulatory Organization's Statement of the Purpose of, and the Statutory Basis for, the Proposed Rule Change

#### 1.  Purpose 

The purpose of the proposed rule change is to amend the Fee Schedule to make orders that add non-displayed volume in securities priced at or below $1.00 per share eligible to receive the Sub-Dollar Rebate Tier. This change in the Fee Schedule would make all executions that add volume eligible for the Sub-Dollar Rebate when a Member reaches the applicable criteria, regardless of whether such added volume is displayed or non-displayed.

                    The Exchange first notes that it operates in a highly competitive market in which market participants can readily direct order flow to competing venues if they deem fee levels at a particular venue to be excessive or incentives to be insufficient. More specifically, the Exchange is only one of 16 registered equities exchanges, as well as a number of alternative trading systems and other off-exchange venues, to which market participants may direct their order flow. Based on publicly available information, no single registered equities exchange currently has more than approximately 15% of the total market share of executed                           ( print page 64005)                        volume of equities trading.[5]                                          Thus, in such a low-concentrated and highly competitive market, no single equities exchange possesses significant pricing power in the execution of order flow, and the Exchange currently represents approximately 3% of the overall market share.[6]                                          The Exchange in particular operates a “Maker-Taker” model whereby it provides rebates to Members that add liquidity to the Exchange and charges fees to Members that remove liquidity from the Exchange. The Fee Schedule sets forth the standard rebates and fees applied per share for orders that add and remove liquidity, respectively. Additionally, in response to the competitive environment, the Exchange also offers tiered pricing, which provides Members with opportunities to qualify for higher rebates or lower fees where certain volume criteria and thresholds are met. Tiered pricing provides an incremental incentive for Members to strive for higher tier levels, which provides increasingly higher benefits or discounts for satisfying increasingly more stringent criteria.                

                    Currently, the Exchange provides a rebate of 0.15% of the total dollar value of the transaction for executions of orders in securities priced below $1.00 per share that add displayed liquidity to the Exchange (such orders, “Added Displayed Sub-Dollar Volume”) for Members that qualify for such tier by achieving a Sub-Dollar ADAV [7]                                          that is equal to or greater than 5,000,000 shares. A footnote in the current Fee Schedule states that the Sub-Dollar Rebate applies to executions of added displayed volume in securities priced below $1.00 per share. Thus, the Sub-Dollar Rebate does not currently apply to executions of added non-displayed volume that add liquidity to the Exchange (such orders, “Added Non-Displayed Sub-Dollar Volume”). Now, the Exchange proposes to modify the types of orders which qualify for the Sub-Dollar Rebate, such that orders which add displayed liquidity as well as orders which add non-displayed liquidity to the Exchange in securities priced below $1.00 per share would be eligible for the Sub-Dollar Rebate. To clarify, the Sub-Dollar Rebate would apply to executions of both Added Displayed Sub-Dollar Volume and Added Non-Displayed Sub-Dollar Volume when a Member meets the required criteria for the tier. The Exchange would alter the footnote in the Sub-Dollar Rebate Tier section of the Fee Schedule to remove the word “displayed”, such that all executions which add volume to the Exchange would be eligible for the Sub-Dollar Rebate. At this time, the Exchange does not propose to change the rebate amount nor the required criteria for the Sub-Dollar Rebate Tier.                

The Exchange believes that this modification to the method of applying the Sub-Dollar Rebate Tier would encourage the submission of both displayed and non-displayed orders in securities priced below $1.00 per share that add liquidity to the Exchange. The Exchange believes that it would contribute to a more robust and well-balanced market ecosystem of both displayed and non-displayed orders which add liquidity on the Exchange, to the benefit of all Members and market participants. The Exchange notes that the Sub-Dollar Rebate Tier would continue to be available to all Members and, while the Exchange has no way of predicting with certainty how the proposed new modification will impact Member activity, the Exchange expects that more Members will qualify or strive to qualify for the Sub-Dollar Rebate Tier than currently do under the proposed new calculation method, as it is more expansive and includes additional types of executions which would be eligible to receive the rebate under the tier.

#### 2.  Statutory Basis 

                    The Exchange believes that the proposed rule change is consistent with the provisions of Section 6 of the Act,[8]                                          in general, and with Sections 6(b)(4) and 6(b)(5) of the Act,[9]                                          in particular, in that it provides for the equitable allocation of reasonable dues, fees and other charges among its Members and other persons using its facilities and is not designed to permit unfair discrimination between customers, issuers, brokers, or dealers.                

                    As discussed above, the Exchange operates in a highly fragmented and competitive market in which market participants can readily direct order flow to competing venues if they deem fee levels at a particular venue to be excessive or incentives to be insufficient, and the Exchange represents only a small percentage of the overall market. The Commission and the courts have repeatedly expressed their preference for competition over regulatory intervention in determining prices, products, and services in the securities markets. In Regulation NMS, the Commission highlighted the importance of market forces in determining prices and SRO revenues and also recognized that current regulation of the market system “has been remarkably successful in promoting market competition in its broader forms that are most important to investors and listed companies.” [10] 

The Exchange believes that the ever-shifting market share among the exchanges from month to month demonstrates that market participants can shift order flow or discontinue to reduce use of certain categories of products, in response to new or different pricing structures being introduced into the market. Accordingly, competitive forces constrain the Exchange's transaction fees and rebates, and market participants can readily trade on competing venues if they deem pricing levels at those other venues to be more favorable. The Exchange believes the proposal reflects a reasonable and competitive pricing structure designed to encourage market participants to strive for higher volume on the Exchange, which the Exchange believes would promote price discovery and enhance liquidity and market quality on the Exchange to the benefit of all Members and market participants.

The Exchange notes that volume-based incentives such as the Sub-Dollar Rebate Tier have been widely adopted by exchanges (including the Exchange), and are reasonable, equitable, and not unfairly discriminatory because they are open to all members on an equal basis and provide additional benefits or discount that are reasonably related to the value to an exchange's market quality associated with higher levels of market activity, such as higher levels of liquidity provision and/or growth patterns, and the introduction of higher volumes of orders into the price and volume discovery process.

                    The Exchange believes the proposal to include Added Non-Displayed Sub-Dollar Volume in the executions eligible to qualify for the Sub-Dollar Rebate is reasonable because, as noted above, such change would keep the existing criteria and rebate amount intact and provide more opportunities for a Member to achieve the rebate. Members may be incentivized to submit additional orders which add displayed liquidity and which add non-displayed                           ( print page 64006)                        liquidity in securities priced below $1.00 per share, thereby contributing to a more robust and well-balanced market ecosystem on the Exchange to the benefit of all Members and market participants. The Exchange also believes the proposal is equitable and not unfairly discriminatory because all Members will continue to be eligible to meet the Sub-Dollar Rebate Tier criteria, including Members who currently receive the Sub-Dollar Rebate under the current method. As noted above, while the Exchange has no way of predicting with certainty how the proposed new criteria will impact Member activity, the Exchange expects that this change will incentivize more Members to strive to qualify for such tier under the proposed new method, as the new method is more expansive and would make the Sub-Dollar Rebate applicable to additional executions.                

                    For the reasons discussed above, the Exchange submits that the proposal satisfies the requirements of Sections 6(b)(4) and 6(b)(5) of the Act [11]                                          in that it provides for the equitable allocation of reasonable dues, fees and other charges among its Members and other persons using its facilities and is not designed to unfairly discriminate between customers, issuers, brokers, or dealers. As described more fully below in the Exchange's statement regarding the burden on competition, the Exchange believes that its transaction pricing is subject to significant competitive forces, and that the proposed fees and rebates described herein are appropriate to address such forces.                

### B. Self-Regulatory Organization's Statement on Burden on Competition

                    The Exchange does not believe that the proposal will result in any burden on competition that is not necessary or appropriate in furtherance of the purposes of the Act. Instead, as discussed above, the proposal is intended to incentivize market participants to direct additional order flow to the Exchange in the form of both displayed and non-displayed liquidity in securities priced below $1.00 per share, which the Exchange believes would promote price discovery and enhance liquidity and market quality on the Exchange to the benefit of all Members and market participants. As a result, the Exchange believes the proposal would enhance its competitiveness as a market that attracts actionable orders, thereby making it a more desirable destination venue for its customers. For these reasons, the Exchange believes that the proposal furthers the Commission's goal in adopting Regulation NMS of fostering competition among orders, which promotes “more efficient pricing of individual stocks for all types of orders, large and small.” [12] 

#### Intramarket Competition

As discussed above, the Exchange believes that the proposal would incentivize Members to submit additional order flow to the Exchange in the form of both displayed and non-displayed orders in securities priced below $1.00 per share, thereby enhancing liquidity and market quality on the Exchange to the benefit of all Members, as well as enhancing the attractiveness of the Exchange as a trading venue, which the Exchange believes, in turn, would continue to encourage market participants to direct additional order flow to the Exchange. Greater liquidity benefits all Members by providing more trading opportunities and encourages Members to send additional orders to the Exchange, thereby contributing to robust levels of liquidity, which benefits all market participants.

The Exchange does not believe that the proposed change to the Sub-Dollar Rebate Tier would impose any burden on intramarket competition because such change may incentivize Members to submit additional order flow, thereby contributing to a more robust and well-balanced market ecosystem on the Exchange to the benefit of all Members as well as enhancing the attractiveness of the Exchange as a trading venue, which the Exchange believes, in turn, would continue to encourage market participants to direct additional order flow to the Exchange. Greater liquidity benefits all Members by providing more trading opportunities and encourages Members to send additional orders to the Exchange, thereby contributing to robust levels of liquidity, which benefits all market participants. The opportunity to qualify for the Sub-Dollar Rebate Tier would be available to all Members that meet the associated volume requirements in any month. For the foregoing reasons, the Exchange believes the proposed change would not impose any burden on intramarket competition that is not necessary or appropriate in furtherance of the purposes of the Act.

#### Intermarket Competition

As noted above, the Exchange operates in a highly competitive market in which market participants can readily direct order flow to competing venues if they deem fee levels at a particular venue to be excessive or incentives to be insufficient. Members have numerous alternative venues that they may participate on and direct their order flow to, including 15 other equities exchanges and numerous alternative trading systems and other off-exchange venues. As noted above, no single registered equities exchange currently has more than approximately 15% of the total market share of executed volume of equities trading. Thus, in such a low-concentrated and highly competitive market, no single equities exchange possesses significant pricing power in the execution of order flow. Moreover, the Exchange believes that the ever-shifting market share among the exchanges from month to month demonstrates that market participants can shift order flow or discontinue to reduce use of certain categories of products, in response to new or different pricing structures being introduced into the market. Accordingly, competitive forces constrain the Exchange's transaction fees and rebates and market participants can readily choose to send their orders to other exchange and off-exchange venues if they deem fee levels at those other venues to be more favorable. As described above, the proposed change represents a competitive proposal through which the Exchange is seeking to incentivize market participants to direct additional order flow to the Exchange through the volume-based Sub-Dollar Rebate Tier. Volume-based tiers have been widely adopted by exchanges, including the Exchange. Accordingly, the Exchange believes the proposal would not burden, but rather promote, intermarket competition by enabling it to better compete with other exchanges that offer tiered pricing structures and incentives to market participants.

                    Additionally, the Commission has repeatedly expressed its preference for competition over regulatory intervention in determining prices, products, and services in the securities markets. Specifically, in Regulation NMS, the Commission highlighted the importance of market forces in determining prices and SRO revenues and, also, recognized that current regulation of the market system “has been remarkably successful in promoting market competition in its broader forms that are most important to investors and listed companies.” [13]                                          The fact that this market is competitive has also long been recognized by the courts. In                     *NetCoalition*                     v.                     *SEC,*                     the D.C. Circuit                           ( print page 64007)                        stated as follows: “[n]o one disputes that competition for order flow is `fierce.' . . . As the SEC explained, `[i]n the U.S. national market system, buyers and sellers of securities, and the broker-dealers that act as their order-routing agents, have a wide range of choices of where to route orders for execution'; [and] `no exchange can afford to take its market share percentages for granted' because `no exchange possesses a monopoly, regulatory or otherwise, in the execution of order flow from broker dealers'. . . .”.[14]                                          Accordingly, the Exchange does not believe its proposed pricing change imposes any burden on competition that is not necessary or appropriate in furtherance of the purposes of the Act.                

### C. Self-Regulatory Organization's Statement on Comments on the Proposed Rule Change Received From Members, Participants, or Others

The Exchange neither solicited nor received comments on the proposed rule change.

## III. Date of Effectiveness of the Proposed Rule Change and Timing for Commission Action

                    The foregoing rule change has become effective pursuant to Section 19(b)(3)(A)(ii) of the Act [15]                                          and Rule 19b-4(f)(2) [16]                                          thereunder.                

At any time within 60 days of the filing of the proposed rule change, the Commission summarily may temporarily suspend such rule change if it appears to the Commission that such action is necessary or appropriate in the public interest, for the protection of investors, or otherwise in furtherance of the purposes of the Act. If the Commission takes such action, the Commission shall institute proceedings to determine whether the proposed rule change should be approved or disapproved.

## IV. Solicitation of Comments

Interested persons are invited to submit written data, views and arguments concerning the foregoing, including whether the proposed rule change is consistent with the Act. Comments may be submitted by any of the following methods:

### Electronic Comments

    - Use the Commission's internet comment form ( https://www.sec.gov/​rules/​sro.shtml ); or                
    - Send an email to rule-comments@sec.gov.                      Please include file number SR-MEMX-2023-21 on the subject line.                

### Paper Comments

    - Send paper comments in triplicate to Secretary, Securities and Exchange Commission, 100 F Street NE, Washington, DC 20549-1090.

                    All submissions should refer to file number SR-MEMX-2023-21. This file number should be included on the subject line if email is used. To help the Commission process and review your comments more efficiently, please use only one method. The Commission will post all comments on the Commission's internet website (                    *https://www.sec.gov/​rules/​sro.shtml*). Copies of the submission, all subsequent amendments, all written statements with respect to the proposed rule change that are filed with the Commission, and all written communications relating to the proposed rule change between the Commission and any person, other than those that may be withheld from the public in accordance with the provisions of 5 U.S.C. 552, will be available for website viewing and printing in the Commission's Public Reference Room, 100 F Street NE, Washington, DC 20549, on official business days between the hours of 10 a.m. and 3 p.m. Copies of the filing also will be available for inspection and copying at the principal office of the Exchange. Do not include personal identifiable information in submissions; you should submit only information that you wish to make available publicly. We may redact in part or withhold entirely from publication submitted material that is obscene or subject to copyright protection. All submissions should refer to file number SR-MEMX-2023-21 and should be submitted on or before October 10, 2023.                

                        For the Commission, by the Division of Trading and Markets, pursuant to delegated authority.[17] 

Sherry R. Haywood,

Assistant Secretary.

# Footnotes

1.                             15 U.S.C. 78s(b)(1).                    
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2.                             15 U.S.C. 78a.                    
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3.                             17 CFR 240.19b-4.                    
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4.                                                     *See*                         Exchange Rule 1.5(p).                    
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5.                             Market share percentage calculated as of August 31, 2023. The Exchange receives and processes data made available through consolidated data feeds (                        *i.e.,*                         CTS and UTDF).                    
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6.                                                     *Id.*
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7.                             “Sub-Dollar ADAV” means ADAV with respect to orders in securities priced below $1.00 per share. “ADAV” means average daily added volume calculated as the number of shares added per day, calculated on a monthly basis.                    
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8.                             15 U.S.C. 78f.                    
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9.                             15 U.S.C. 78f(b)(4) and (5).                    
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10.                             Securities Exchange Act Release No. 51808 (June 9, 2005), 70 FR 37496, 37499 (June 29, 2005).                    
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11.                             15 U.S.C. 78f(b)(4) and (5).                    
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12.                                                     *See*                         supra note 10.                    
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13.                                                     *See*                         supra note 10.                    
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14.                                                     *NetCoalition*                         v.                         *SEC,*                         615 F.3d 525, 539 (D.C. Cir. 2010) (quoting Securities Exchange Act Release No. 59039 (December 2, 2008), 73 FR 74770, 74782-83 (December 9, 2008) (SR-NYSE-2006-21)).                    
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15.                             15 U.S.C. 78s(b)(3)(A)(ii).                    
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16.                             17 CFR 240.19b-4(f)(2).                    
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17.                                 17 CFR 200.30-3(a)(12).                        
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[FR Doc. 2023-20081 Filed 9-15-23; 8:45 am]

BILLING CODE 8011-01-P