NYSE Clarifies Halt Rules for Corporate Events
Published Date: 7/13/2026
Notice
Summary
NYSE Arca is updating its rules to make it clearer when and how trading stops for companies going through big changes, like mergers or stock splits. This helps keep trading smooth and fair, especially as NYSE Arca plans to trade nearly all day, five days a week. These changes affect companies listed on NYSE Arca and aim to prevent confusion or unfair trading during important corporate events.
Analyzed Economic Effects
5 provisions identified: 5 benefits, 0 costs, 0 mixed.
Mandatory halts for nine corporate actions
If a company listed on NYSE Arca is subject to certain corporate actions, the Exchange will be required to halt trading in that security. The rule lists nine specific actions that trigger a mandatory halt: (1) trading symbol changes; (2) CUSIP changes; (3) stock dividends worth at least 25% of the Official Closing Price; (4) forward or reverse stock splits; (5) De-SPAC transactions; (6) spin-offs; (7) security-type changes; (8) mergers or mandatory exchanges; and (9) other issuer events the Exchange finds comparable.
When halts start and trading resumes
Under the new rule, for covered corporate actions the Exchange will halt trading after the end of the Late Trading Session and before the Overnight Trading Session begins at 9:00 p.m. ET on the day before the market-effective date. Trading in the halted security will resume with a Trading Halt Auction at 8:00 a.m. ET on the market-effective date.
Residual authority to halt other issuer events
The Exchange may also declare a mandatory regulatory halt for any other corporate action or issuer-related event not listed if senior trading and regulatory officials determine, based on the totality of circumstances and available information (including issuer information), that a halt is necessary to maintain fair and orderly markets or protect investors.
Reverse split reopen and implementation time changes
The Exchange will align reverse stock split halts with the new corporate-action framework by shifting the implementation timing to after the Late Trading Session and before the Overnight Session at 9:00 p.m. ET, and by changing the re-open time after such halts from 9:00 a.m. ET to 8:00 a.m. ET on the market-effective date.
Operative with 23/5 Trading and marketwide harmonization
These Rule 7.18-E changes are intended to take effect at the start of NYSE Arca's 23/5 Trading (23 hours per day, 5 days per week) and the Exchange expects other Primary Listing Exchanges to implement substantially identical rules to ensure consistent treatment of corporate actions across the market.
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