NYSE Gears Up Trading Halts for Nearly Non-Stop Stock Frenzy
Published Date: 9/18/2026
Notice
Summary
The New York Stock Exchange (NYSE) is updating its rules about when and how trading stops and starts for stocks involved in big company events. This change helps prepare for longer trading hours—23 hours a day, 5 days a week—making sure everything runs smoothly. Traders and companies will see clearer rules starting right away, with no extra costs involved.
Analyzed Economic Effects
3 provisions identified: 3 benefits, 0 costs, 0 mixed.
Mandatory Halts for Certain Corporate Actions
If a NYSE-listed stock is subject to certain corporate actions under 23/5 Trading, the Exchange will declare a mandatory Regulatory Halt after the end of post-market trading on other markets and before overnight trading begins at 9:00 p.m. ET on the day before the action takes effect. Trading in the halted security will resume with a Trading Halt Auction after 9:30 a.m. ET on the market-effective date. The covered corporate actions include trading symbol changes; CUSIP changes; dividends equal to at least 25% of the Official Closing Price; stock splits (forward and reverse); De-SPAC transactions; spin-offs; security-type changes; mergers/mandatory exchanges; and similar issuer events.
Residual Discretionary Halt Authority
The Exchange may require a mandatory Regulatory Halt for any other issuer-related corporate action not specifically listed if Exchange officials determine, based on available information, that a halt is necessary to maintain fair and orderly markets or protect investors. Once the Exchange makes that determination in advance of the corporate-action effective date, the regulatory halt is mandatory under the rule.
Timing Change for Reverse Split Halts
The Exchange is aligning the timing for reverse stock split halts with the other corporate-action halts under 23/5 Trading by moving implementation to after post-market trading and before 9:00 p.m. ET on the day before the split, instead of the prior 7:50 p.m. ET timing. As with other covered actions, trading after a reverse split will resume with a Trading Halt Auction after 9:30 a.m. ET on the market-effective date.
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Key Dates
Department and Agencies
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