Market regulation · 24/04/2026

Self-Regulatory Organizations; Cboe BZX Exchange, Inc.; Notice of Filing and Immediate Effectiveness of a Proposed Rule Change To Amend Rule 21.17 To Adopt a Wide Market Protection Mechanism Designed To Reduce the Risk of Orders Executing at Extreme or Adverse Prices When the National Best Bid and Offer (“NBBO”) Is Determined To Be Wide

Cboe BZX Exchange, Inc. has filed a proposed rule change to amend Rule 21.17 and adopt a wide market protection mechanism to reduce the risk of orders executing at extreme or adverse prices when the National Best Bid and Offer (NBBO) is determined to be wide.