NYSE Arca Launches Overnight Trading Hours
Published Date: 5/27/2026
Notice
Summary
NYSE Arca is shaking up its trading hours by adding a brand-new Overnight Trading Session and tweaking the start and end times of its Early and Late Trading Sessions. This means traders get more chances to buy and sell stocks outside regular hours, making the market more flexible and lively. These changes kicked in right away on May 12, 2026, giving everyone more time to trade and potentially more opportunities to make money.
Analyzed Economic Effects
7 provisions identified: 4 benefits, 1 costs, 2 mixed.
NYSE Arca adds Overnight trading hours
The Exchange proposes a new Overnight Trading Session that will begin at 9:00 p.m. Eastern Time Sunday through Thursday and run through the next session, with the Exchange operating from 9:00 p.m. ET Sunday to 8:00 p.m. ET Friday. Trading will pause for one hour from 8:00 p.m. ET to 9:00 p.m. ET Monday through Thursday for technical refreshes, and the Exchange will begin accepting orders for the trading day at 8:59 p.m. ET before the Overnight session starts.
Which order types work Overnight
The Exchange specifies which order types are permitted or rejected in the Overnight Trading Session: Market Orders and Pegged Orders are not eligible and will be rejected if designated for the Overnight session; Limit IOC orders are permitted if designated for Overnight; MOO, MOC, LOC, Primary Only, and Directed Orders designated for the Overnight session will be rejected; certain non-displayed and other order types entered before the Overnight session will be rejected.
Limit order price protection extended
Limit Order Price Protection, which applied to the Early and Late Trading Sessions, will also apply during the new Overnight Trading Session.
Firms can block overnight executions
The Exchange will offer Entering Firms a pre-trade risk control to prohibit orders from executing during the Overnight Trading Session, and it proposes to allow Clearing Firms designated by Entering Firms to likewise prohibit orders from executing during the Overnight Trading Session via an amendment to Rule 7.19-E(c)(1).
Clearly erroneous reviews apply Overnight
The Exchange amends Rule 7.10-E to make clearly erroneous transaction reviews available for trades occurring during the Overnight Trading Session on the same basis as they are for the Early and Late Trading Sessions.
Holiday schedule clarified for Overnight sessions
If the Exchange is closed for a holiday between Monday and Friday, the Exchange will conclude its Late Trading Session the evening before the holiday and will commence the next Overnight Trading Session at 9:00 p.m. Eastern Time on the evening of the holiday.
Launch timing aligned to industry (Dec 6, 2026)
The Exchange proposes to replace the preamble's "within 18 months" deadline with "24 months," and states it expects to align with the industry's projected readiness date for Extended Hours Trading of December 6, 2026.
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Previous: 2026-10449 — Self-Regulatory Organizations; Cboe EDGX Exchange, Inc.; Notice of Filing and Immediate Effectiveness of a Proposed Rule Change To Amend Its Fee Schedule by Introducing a New RPI Add Tier and Amending Its Fee Code Table Applicable to Securities Priced Below $1.00
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Next: 2026-10451 — Self-Regulatory Organizations; ICE Clear Credit LLC; Notice of Filing of Proposed Rule Change Relating to the Clearance of Additional Credit Default Swap Contracts
ICE Clear Credit is planning to start clearing more credit default swap contracts, especially for some emerging market and Asia/Pacific countries. This change affects traders and investors who use these contracts to manage risk. The new rules could kick in soon, making it easier and safer to trade these financial products.