Published on: 2026-08-18
Nasdaq plans to add a 9 p.m. to 4 a.m. ET Night Session on December 6, extending its U.S. stock-trading day by seven hours. Broker access will still determine who can use those hours, order choices will be more limited, and overnight execution can vary sharply from one stock to another. The new session will also use a separate price-protection system from the regular 9:30 a.m.–4 p.m. market.
Nasdaq targets December 6 for its 23/5 expansion, adding a Night Session from 9 p.m. to 4 a.m. ET with a one-hour break between 8 p.m. and 9 p.m.
Nasdaq opening overnight does not guarantee access through every brokerage account. Firms decide whether to offer extended-hours trading and which securities customers can access.
Nasdaq will accept eligible limit-priced orders during the Night Session. Market, pegged, auction-specific, and several other order types will not be available.
Temporary Phase 1 overnight price bands will operate from 9 p.m. to 4 a.m., then expire before regular Limit Up-Limit Down protection begins at 9:30 a.m.
Nasdaq’s planned Night Session will run from 9 p.m. until 4 a.m. ET, while its existing 4 a.m.–8 p.m. trading period becomes the Day Session. The exchange will close for one hour between 8 p.m. and 9 p.m., and each new trading day will begin when the Night Session opens.
The session will not be limited to companies listed on Nasdaq. The SEC-approved framework allows all NMS stocks to trade during the Night Session, meaning Nasdaq can handle eligible securities whose primary listing is on another U.S. exchange as well as exchange-traded products.
The SEC approved Nasdaq’s 23-hour trading rules in April. December 6 remains the implementation target, and the UTP SIP is scheduled to begin its own 23-hour operating timetable that day. NSCC has already extended clearing availability to 24×5, supporting overnight activity from exchanges and alternative trading systems.
Nasdaq opening at 9 p.m. does not mean your brokerage account will. Firms still decide whether to offer extended-hours access, which securities are available, and how they handle customer orders during those sessions.
Overnight stock trading already exists through alternative venues, so December 6 does not suddenly create night-time U.S. equity trading. Nasdaq’s change adds its own regulated exchange session to that window.
Anyone relying on a 2 a.m. trade will therefore need to check their broker’s supported hours and eligible securities rather than assuming Nasdaq’s schedule automatically applies to every account.
Nasdaq’s Night Session requires orders to be limit-priced, although that does not mean every type of limit order is eligible. The SEC-approved rules exclude market and pegged orders along with auction-specific orders such as Limit-on-Open and Limit-on-Close, plus several midpoint and specialised Nasdaq order types.
A standard limit order sets the highest price a buyer will pay or the lowest price a seller will accept. If no matching order is available at that price, the order can remain unfilled rather than executing automatically at the next available price.
Orders also face a hard session boundary. Night Session orders still on Nasdaq’s book will not simply continue into the following Day Session, so anyone placing an overnight order should check how their broker handles orders around the 4 a.m. transition.
Existing overnight trading shows that execution conditions can differ substantially by security. In a study of Blue Ocean ATS activity from January through May 2024, 393 stocks that traded overnight every day had volume-weighted quoted spreads of 27.61 basis points overnight versus 19.72 basis points during regular hours. Displayed depth averaged 6,991 shares overnight against 14,980 shares during regular trading.
The wider sample tells a tougher story. Across 3,026 stocks that traded overnight at least once, volume-weighted quoted spreads reached 89.36 basis points overnight versus 36.61 basis points during regular hours. Displayed depth was much closer at 5,519 shares overnight and 5,624 during regular hours.
The difference suggests overnight execution quality is highly stock-dependent. Frequently traded names already show wider spreads and roughly half the displayed depth of regular trading, while the broader universe shows much larger spread deterioration even when quoted depth appears similar.
FINRA’s extended-hours disclosure also warns that lower liquidity can produce partial executions or no execution and that spreads may be wider outside regular hours.
The SEC approved an interim Phase 1 overnight price-band framework for trading between 9 p.m. and 4 a.m. ET. The system uses two reference prices, the official closing price and the consolidated last round-lot trade as of 7:45 p.m. For ordinary NMS stocks, the lower band is generally 20% below the lower reference price and the upper band 20% above the higher one.
The 20% figure has an important exception. Stocks closing at $1 or more must have bands at least $3 away from the applicable reference price, while stocks below $1 have a minimum $1 distance. Leveraged ETP thresholds adjust based on their leverage ratio.
That means a $5 stock with both reference prices at $5 would not simply receive a $4–$6 range based on 20%. Instead, the $3 minimum distance would push the bands to $2 and $8.
Trades outside the permitted bands will be blocked, although reaching a band does not automatically trigger the same trading pause used by regular-hours LULD rules.
Trading window |
ET hours |
Price-band regime |
Night Session |
9 p.m.–4 a.m. |
Phase 1 overnight bands |
Pre-market |
4 a.m.–9:30 a.m. |
No LULD bands |
Regular session |
9:30 a.m.–4 p.m. |
Regular LULD |
The 4 a.m.–9:30 a.m. period remains outside both systems. Regulators chose the 4 a.m. cutoff so earnings announcements and other pre-market disclosures can move prices without overnight bands based on the previous day’s activity.
Phase 1 is not intended to be permanent. The LULD Plan participants plan to analyse data from the first full quarter of overnight trading and later submit Phase 2 revisions that replace the interim protections.
No. The SEC has approved Nasdaq’s 23-hour rules and the UTP SIP is scheduled for December 6, although Nasdaq’s Night Session remains dependent on the required market systems being ready for overnight operations.
No. Nasdaq’s approved Night Session allows all NMS stocks to trade, including securities primarily listed on another U.S. exchange. Exchange-traded products are also covered, although individual broker availability may be narrower.
Not under Nasdaq’s approved equity framework. The rule covers NMS stocks and exchange-traded products. Options operate under separate exchange rules, so their schedules should not be assumed to follow Nasdaq’s December Night Session.
No. Longer trading hours let prices react earlier to news, but thin or uneven liquidity can still produce sharp moves. Whether gaps narrow consistently will depend on how much overnight trading develops after launch.
Nasdaq’s new schedule gives the U.S. equity market another window to react to earnings, economic releases and other news before the traditional morning session. It will not make 2 a.m. trading the same as noon. Broker access, eligible order types, available liquidity and a separate overnight price-band system will determine what those seven extra hours actually offer.
The first useful evidence after December 6 will be overnight spreads, depth and trading volume. If spreads stay wide and volume stays thin, trading at 2 a.m. will not mean there is much of a market to trade against.
