2026-19130NoticeWallet

MRX Follows Suit on Flexible Market Maker Rules

Published Date: 9/18/2026

Notice

Summary

Nasdaq MRX is changing its rules so it doesn’t have to pick a Primary Market Maker (PMM) for every options class anymore—it can choose when to appoint one based on market needs. This gives the Exchange more flexibility without any immediate cost changes. Traders and market makers should watch for how this might affect options trading starting right away.

Analyzed Economic Effects

4 provisions identified: 3 benefits, 0 costs, 1 mixed.

PMM Appointments Become Optional

Nasdaq MRX changed Options 2, Section 3(b) so a Primary Market Maker (PMM) may be appointed to each options class instead of being required to appoint a PMM to every class. The Exchange said it will decide on a class-by-class basis based on prevailing market conditions and availability of qualified applicants (filing dated September 2, 2026).

CMMs Remain Liquidity Backstop

If a PMM is not appointed for an options class, Competitive Market Makers (CMMs) will continue to provide liquidity under Options 2, Sections 4 and 5; CMMs are required to provide two-sided quotations in 60% of the series in classes to which they are appointed and are not capped in number. The Exchange states that quoting and liquidity provision would proceed under the CMM framework where no PMM is appointed.

PMM Obligations and Appointments Preserved

The change does not alter the substantive obligations or privileges of a PMM once appointed: a PMM remains subject to the full set of obligations in Options 2, Sections 3, 4, and 5, including the Valid Width Quote requirement during the Options Opening Process and a 90% two-sided intra-day quoting obligation. Members currently appointed as PMMs will retain their appointments, and members seeking new PMM appointments will be evaluated under the same standards.

Immediate Effect and 60-Day Review Window

The Exchange filed the proposed rule change on September 2, 2026, and the filing became effective pursuant to Section 19(b)(3)(A)(iii) and Rule 19b-4(f)(6). The Commission may temporarily suspend the rule change at any time within 60 days of the filing while it considers whether to approve or disapprove the proposal.

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Key Dates

Effective Date
Published Date
9/2/2026
9/18/2026

Department and Agencies

Department
Independent Agency
Agency
Securities and Exchange Commission
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