Stock Market Now Open 23 Hours a Day
Published Date: 6/3/2026
Notice
Summary
Cboe EDGX Exchange is extending its trading hours to 23 hours a day, five days a week, so traders can buy and sell stocks almost around the clock. This change affects anyone trading equities or exchange-traded products on EDGX and aims to give more flexibility and opportunities to make money. The new hours will start soon after the SEC’s quick approval, making the market more accessible and exciting!
Analyzed Economic Effects
6 provisions identified: 3 benefits, 1 costs, 2 mixed.
EDGX Extends Trading To 23x5
Cboe EDGX will permit trading of equity securities and exchange-traded products 23 hours per day, five days per week. Under the proposal, the trading day runs from 9:00 p.m. ET on one calendar day through 8:00 p.m. ET the next day, with sessions of Overnight Trading Session (9:00 p.m.–4:00 a.m.), Pre-Opening Session (4:00 a.m.–9:30 a.m.), Regular Trading Hours (9:30 a.m.–4:00 p.m.), and Post-Closing Session (4:00 p.m.–8:00 p.m.).
New Order Entry Window and Night Pause
Orders may be entered beginning at the Order Acceptance Queueing Time of 8:55 p.m. ET on each night preceding a business day and accepted through 8:00 p.m. ET on the same trading day; orders entered during the queueing time will queue until the session start. The Exchange will pause trading weekdays from 8:00 p.m. to 9:00 p.m. ET (no weekday pause on Sunday), cancel all resting orders at 8:00 p.m. ET each weekday, and trades at or after the Overnight Trading Session start (9:00 p.m.) will be assigned the following calendar day's trade date.
Order Type Limits in Extended Hours
Outside Regular Trading Hours only Limit Orders are eligible for execution, and the proposal bars certain orders during the 8:55 p.m. Order Acceptance Queueing Time (including Post Only, ISOs, Market Orders except those with RHO or a Stop Price, Minimum Execution Quantity with RHO, IOC, and FOK). Market MidPoint Peg Orders will be executable only during Regular Trading Hours.
Mandatory Overnight Session Risk Disclosures
Members must provide customers tailored disclosures before accepting orders for the Overnight Trading Session and Pre-Opening Session covering seven risk categories: primary listing markets may be closed, regulatory protections may be limited, limited trading alternatives, near-continuous trading risks, settlement infrastructure closures and settlement delay risk, novelty/unforeseen risks from overnight exchange trading, and a general catch-all for other risks.
Existing Protections Remain In Force
The Exchange states that existing protections—surveillance programs, clearly erroneous execution rules, risk settings, fat finger protections, membership and fair practice rules, and halt rules—will continue to apply during the Overnight Trading Session.
Start Contingent on Data Plan Readiness and Filings
The Exchange will not commence the Overnight Trading Session until the Equity Data Plans have (1) established mechanisms to collect and disseminate quotation and transaction information at all times during the Overnight Trading Session and (2) provided notification they are prepared; the Exchange must also file a proposed rule change confirming readiness prior to starting. If that Overnight Trading Session Proposed Rule Change is not filed within 18 months of the SEC's approval, the Exchange will promptly file to remove the Overnight Trading Session rules.
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Key Dates
Department and Agencies
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