NYSE National files best execution rule change for equity trading permits

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NYSE best execution rule update

Highlights

NYSE National filed to adopt Rule 11.5310, replacing Rule 11.12.10, to standardize best execution obligations for ETP holders and associated persons.
The proposed rule, modeled on Nasdaq PHLX and NYSE standards, defines five factors to assess reasonable diligence in securing best execution for customers.
Filed for immediate effectiveness, the rule aligns NYSE National with Section 6(b)(5) of the Exchange Act to support investor protection and equitable market practices.

Rule overhaul and filing timeline

The Securities and Exchange Commission published notice that NYSE National filed a proposed rule change to adopt new Rule 11.5310, which would replace current Rule 11.12.10 and set best execution obligations for ETP holders and associated persons.

The exchange says the new rule is based on Nasdaq PHLX Rule General 9, Section 11 and NYSE Rule 5310. It is intended to govern how members use reasonable diligence to obtain the best market for customer orders so that transactions are executed at the most favorable available prices.

The filing states that five factors would be considered in assessing whether an ETP holder used reasonable diligence, including the character of the market for the security, the size and type of transaction, the number of markets checked, the accessibility of the quotation, and the order's terms and conditions as communicated to the firm or associated person.

NYSE National also proposes supplementary material to provide additional guidance on best execution duties. The exchange filed the change for immediate effectiveness under Section 19(b)(3)(A)(iii) of the Securities Exchange Act and Rule 19b-4(f)(6).

Investor protection and market impact

The exchange argues the proposal is consistent with Section 6(b) of the Act and specifically with Section 6(b)(5), which focuses on preventing fraudulent and manipulative acts, promoting equitable trading principles, and supporting a free and open market system.

NYSE National says the rule change does not impose any unnecessary or inappropriate burden on competition. By bringing its requirements closer to existing Nasdaq and NYSE best execution frameworks, the proposal signals a compliance-focused effort to standardize expectations for order handling and customer treatment across U.S. equity markets.

The Commission is soliciting public comment on the filing under file number SR-NYSENAT-2026-16. Comments may be submitted electronically through the SEC's online form or by email, or sent in paper form to the agency in Washington.

Our earlier article on the UK consolidated equities tape debate explained how the London Stock Exchange Group is urging the Financial Conduct Authority to adopt a post-trade-only model rather than one that also includes pre-trade quotes. It outlined concerns about transparency incentives, the commercial impact on market data, and the broader context of equity trading increasingly moving away from lit venues ahead of the FCA’s expected July decision.

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