Cboe BZX Sets 23-Hour Halt Recovery Rules in Motion
Published Date: 10/8/2026
Notice
Summary
Cboe BZX Exchange is updating its rules to handle trading pauses after big market drops now that trading hours are expanding to 23 hours a day, 5 days a week. This change affects traders and investors by ensuring smooth and clear trading restarts during these longer hours. The update kicks in right away, helping keep markets stable and confident even during wild swings.
Analyzed Economic Effects
1 provisions identified: 1 benefits, 0 costs, 0 mixed.
Level 3 Halts Resume at 4:00 a.m. ET
If the S&P 500 falls 20% and triggers a Level 3 market-wide circuit breaker, trading will be halted and will not resume until 4:00 a.m. ET or later on the next trading day. This rule will remain in place even after exchanges expand trading to 23 hours per day (including overnight sessions from 9:00 p.m. ET to 4:00 a.m. ET starting December 6, 2026).
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Previous / Next Documents
Previous: 2026-20600, Self-Regulatory Organizations; Cboe BYX Exchange, Inc.; Notice of Filing and Immediate Effectiveness of Proposed Rule Change To Amend Rule 11.29 Concerning the Resumption of Trading Following a Level 3 Market-Wide Circuit Breaker Halt in Connection With the Industry's Expansion of Trading Hours to 23 Hours per Day, 5 Days per Week
Cboe BYX Exchange is updating its rules to handle trading pauses after big market drops now that trading hours are expanding to 23 hours a day, 5 days a week. This change affects traders and investors by ensuring smoother restarts after a Level 3 market-wide halt during these longer hours. The update kicks in right away, helping keep markets stable and confident even during wild swings.
Next: 2026-20602, Self-Regulatory Organizations; Cboe EDGA Exchange, Inc.; Notice of Filing and Immediate Effectiveness of Proposed Rule Change To Amend Rule 11.23 Concerning the Resumption of Trading Following a Level 3 Market-Wide Circuit Breaker Halt in Connection With the Industry's Expansion of Trading Hours to 23 Hours per Day, 5 Days per Week
Cboe EDGA Exchange is updating its rules to handle trading pauses better when the whole market drops a lot, especially now that trading runs almost all day, five days a week. This change affects traders and firms using the exchange by making sure trading restarts smoothly after big market halts during the new longer hours. The update kicks in right away and helps keep the market fair and orderly without messing with your money.