Federal Register #SR-MEMX-2026-33

SEC notice seeking comment on MEMX LLC’s proposed overnight trading rule changes

The SEC is seeking public comment on MEMX LLC’s proposed changes to its clearly erroneous executions rule for overnight trading. - Government agency: U.S. Securities and Exchange Commission (SEC). - Company named: MEMX LLC, which filed the proposed rule change. - Proposal: Amend MEMX Rule 11.15, governing clearly erroneous executions, to align with Overnight Price Bands under the Limit Up-Limit Down (LULD) Plan. - Extend certain restrictions on clearly erroneous review to Overnight Protected Hours. - Allow review of specified transactions in stocks not subject to the LULD Plan under applicable numerical guidelines. - Reverse prior rule changes and update related definitions and provisions for overnight trading. - Requested products or services: None; this is a regulatory notice soliciting public comment on whether the proposed rule change is consistent with the Securities Exchange Act.

Description

MEMX LLC filed a proposed rule change to amend Rule 11.15, which governs clearly erroneous executions. The proposal updates the rule in light of the SEC’s approval of Overnight Price Bands, extending related review restrictions and eligibility provisions to overnight trading. The notice invites comments on whether the proposed rule change is consistent with the Securities Exchange Act; comments are due November 18, 2026.

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