Rule 611 Changes The Mechanics Of Best Execution Not The Obligation

Outlet:
TabbFORUM
 
Published:
June 25, 2026
 
Coverage highlights:
  • Robert Cope, Director of Markets and Operations Strategy for Trillium Surveyor, explains that rescinding Rule 611 would change the mechanics of routing across fragmented U.S. equity markets, but it would not change firms’ obligation to achieve best execution.
  • Without protected quotes serving as a standard routing benchmark, firms may need to place greater emphasis on price improvement, markouts, liquidity and fill quality, venue performance, routing outcomes, trading costs, and changing market conditions.
  • “Market structure rules may change. The obligation to achieve and demonstrate best execution does not.” Firms that can clearly demonstrate through data why an execution delivered the best reasonably available outcome will be best positioned for a potential post-Rule 611 market.

 

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