On Sunday, December 6, 2026, at 9:00 p.m. ET, Nasdaq will begin offering U.S. equity trading for 23 hours each weekday, from Sunday evening through Friday evening, with a one‑hour maintenance pause between 8:00 p.m. and 9:00 p.m. ET. The change reflects the increasingly global nature of investing and aligns market access with the time zones and activity cycles of international investors.
“Investors now expect to engage U.S. markets on a schedule that matches their own calendars,” said Chuck Mack, Senior Vice President of North American Markets at Nasdaq. “23/5 trading delivers that accessibility while preserving the robustness, transparency, and regulatory safeguards that underpin the Nasdaq ecosystem.”
What Are the Current Trading Hours?
Currently, U.S. equities trade from 9:30 a.m. to 4:00 p.m. ET. Extended hours also run from 4:00 a.m. to 9:30 a.m. ET and from 4:00 p.m. to 8:00 p.m. ET.
What Are the New 23/5 Hours?
Starting December 6, the Nasdaq Stock Market will be open Monday through Friday from 9:00 p.m. ET Sunday to 8:00 p.m. ET Friday. A one‑hour pause for maintenance and corporate‑action processing occurs nightly from 8:00 p.m. to 9:00 p.m. ET.
What Is the Purpose of the One‑Hour Pause?
The 8:00 p.m.–9:00 p.m. ET interval provides essential maintenance, clearing, settlement, and reference‑data updates. This brief halt supports operational resilience while keeping the market largely continuous.
What Remains Unchanged?
Nasdaq’s 23/5 framework preserves the core U.S. trading session, including the Opening and Closing Crosses, which are critical for price discovery and benchmark setting. Core investor‑protection mechanisms, regulatory alignment, and market‑data integrity remain intact.
What Are the Opening and Closing Crosses?
The Opening Cross initiates trading at the start of the session, while the Closing Cross finalizes activity at the end. Both provide transparent liquidity events and establish the official close price used by investors, indices, and asset managers.
How Does This Affect U.S. Market Holidays?
All U.S. federal market holidays will continue to be observed under the 23/5 schedule.
Implications for Different Stakeholders
Investors
- Access to U.S. equities is extended across global time zones, enabling overnight trading on a regulated exchange.
- Liquidity will remain concentrated during traditional hours, but the expanded schedule offers a venue to react to news and events as they happen.
- Broker‑dealers and intermediaries can better serve clients during local business hours.
Nasdaq Issuers
- Disclosure, investor‑relations, and reporting obligations stay unchanged. Corporate actions and material announcements continue under existing regulatory processes.
Nasdaq Market‑Data Users
- The longer trading day creates demand for data products that cover extended hours.
- Nasdaq is launching Nasdaq Plus, a consolidated data offering designed for the 23/5 environment and available ahead of the December rollout.
- Nasdaq Plus provides the infrastructure needed to integrate and operationalize expanded‑hours data.
Nasdaq’s Financial‑Technology Clients
- Nasdaq’s technology suite—including Calypso, Nasdaq Eqlipse, Nasdaq Surveillance, and AxiomSL—supports the complexities of longer trading windows, risk management, and regulatory reporting.
- These platforms help banks, brokers, and other institutions adapt to continuous market operations.
Why Focus on a Resilient 23/5 Market?
Trading integrity must be consistent whether it is 2:00 a.m. or 2:00 p.m. Nasdaq’s model ensures this through:
- A dedicated nightly maintenance pause.
- Corporate‑action halts and regulatory safeguards.
- Overnight price‑band protections.
- Enhanced client disclosures.
- Robust regulatory oversight and transparency.
“Our priority is transparent communication and client readiness,” Mack added. “The industry’s collaborative effort, rigorous testing, and focus on resilience will underpin a smooth launch on December 6.”
Looking Ahead
The shift to 23/5 trading underscores the globalization of capital markets. By providing continuous, regulated access, Nasdaq aims to broaden participation while maintaining the transparency, reliability, and investor protections that define U.S. markets.
For additional details and resources, visit Nasdaq’s 23/5 trading hub.
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