The Trade-Through Rule and Locked and Crossed Markets Provisions of Regulation NMS
The Commission is revisiting two pillars of Regulation NMS, the 2005 framework that governs how the U.S. national market system routes and prices orders: the trade-through rule (Rule 611), which requires trading centers to honor better-priced displayed quotations on other exchanges, and the provisions restricting locked and crossed markets. The review asks whether rules written for a slower, less consolidated market still serve investors in today's high-speed, multi-venue structure. Mr. Altahawi's comment letter is part of the public file for this rulemaking.
Read the comment letter (PDF) — opens sec.gov in a new tab