Nasdaq is on track to stretch its equity trading day to 23 hours, adding a 9 p.m. to 4 a.m. ET overnight session on top of its existing 4 a.m. to 8 p.m. window. The SEC granted accelerated approval on April 10, 2026, and the exchange is targeting a December 6, 2026 launch, though infrastructure and clearing readiness could still push that date back.
Nasdaq filed a proposal with the SEC in December 2025 to stretch its equity trading hours from 16 to 23 hours per day, five days a week. The regulator granted accelerated approval on April 10, 2026, putting the exchange on a path toward a launch. The exchange currently expects the transition to begin Sunday, December 6, 2026, pending SEC rule changes and Securities Information Processor readiness.
Two sessions, one pause
The plan splits the trading day into two blocks. The first runs from 4:00 a.m. to 8:00 p.m. ET, covering the pre-market, regular session, and after-hours windows that already exist. The second begins at 9:00 p.m. and runs through 4:00 a.m. ET, capturing the hours when Asian and European markets are active.
A one-hour technical pause from 8:00 p.m. to 9:00 p.m. ET on weekdays separates the two blocks, giving the exchange room to run maintenance on data feeds, clearing systems, and related infrastructure. The regular US session between 9:30 a.m. and 4 p.m. ET would also continue to determine prices through Nasdaq's Opening and Closing Crosses.
Overnight orders come with limits
Orders left open at 4 a.m. from the overnight session would be canceled and could then be resubmitted in the following session. Nasdaq plans to support routable orders overnight, though several order types, including market orders and market-on-close orders, will not be available during that window.
The exchange also wants added protections for the overnight hours. Pending SEC approval, orders outside static price bands would be rejected, with the proposed bands generally set 20% away from reference prices. Overnight sessions have historically carried thinner liquidity and wider bid-ask spreads, a tension the SEC is aware of.
What still has to happen
The December date depends on infrastructure, not just regulatory sign-off. Securities Information Processors, the systems that consolidate and distribute market data across exchanges, need to function reliably overnight. Clearing mechanisms run by the DTCC and other entities must handle settlement for trades executed at 3 a.m. with the same precision as those at 3 p.m.
Industry stakeholders have flagged data feed reliability and clearing process continuity as the two biggest hurdles. A public roundtable is scheduled for September 17, 2026 to work through the operational and regulatory questions before the switch takes effect. If those issues aren't resolved to the SEC's satisfaction, the launch could slip.
Sources: Crypto Briefing, Crypto Briefing
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