NYSE Arca Fixes Trade Errors for 24/7 Trading Era
Published Date: 9/23/2026
Notice
Summary
NYSE Arca is updating its rules about fixing big trading mistakes to match new 23-hour, 5-day trading hours. This change helps keep trades fair and clear during extended hours, affecting traders using the Exchange. The new rule kicks in right away with no extra costs, making sure errors get corrected smoothly.
Analyzed Economic Effects
3 provisions identified: 2 benefits, 0 costs, 1 mixed.
LULD protections extended to overnight hours
You (as a market participant) should know that the Exchange is changing Rule 7.10-E so that when Price Bands from the Limit Up-Limit Down (LULD) Plan are available and correct during LULD Protected Hours (now defined to include Core Trading Session and Overnight Protected Hours), a transaction executed during those hours will generally not be reviewable as a "clearly erroneous" execution. The Overnight Protected Hours are tied to the Overnight Price Bands that apply from 9:00 p.m. ET through 4:00 a.m. ET.
Overnight Price Bands set at ±20% initially
The LULD Operating Committee approved Overnight Price Bands that initially are temporary static bands equal to 20% above and 20% below two reference points, and those Overnight Price Bands apply during Overnight Protected Hours from 9:00 p.m. ET through 4:00 a.m. ET. The Operating Committee will evaluate performance after implementation and may propose changes later.
Rights/warrants remain eligible for error review overnight
Transactions in NMS stocks that are not subject to the LULD Plan (for example, rights and warrants) executed during Overnight Protected Hours will remain eligible for clearly erroneous review, and such transactions will be subject to the same Numerical Guidelines that apply to the Early and Late Trading Sessions. The rule text explicitly extends the existing CEE treatment for these LULD-excluded securities to Overnight Protected Hours.
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