What Happens to Open Orders During the 8 PM Trading Pause?

Under Nasdaq's approved 23/5 rules, every order still resting on the Nasdaq book at 8:00 p.m. ET is canceled, nothing trades until the overnight session opens at 9:00 p.m., and every order left on the book at 4:00 a.m. is canceled again. The new schedule is scheduled to start on December 6, 2026, subject to the securities information processors being ready and to final exchange rule filings. In practice, an order does not slide from the evening session into the night, or from the night into premarket trading, on its own. It has to be entered again, and whether your broker does that for you is the broker's policy, not an exchange rule.

What happens to orders on the exchange book at 8 p.m. ET?

At 8:00 p.m. the Day Session ends and the exchange book is cleared. The SEC order approving Nasdaq's 23/5 rules, dated April 10, 2026, adds Rule 4120(a)(10), which halts trading at 8:00 p.m. on Monday through Thursday, resumes it with the Night Session at 9:00 p.m., and provides that orders outstanding on the Nasdaq book as of 8:00 p.m. "shall be cancelled." The rule does not distinguish between a limit order entered at 10 a.m. and one entered at 7:59 p.m.; both are gone. The pause is one of four changes described in hi2morrow's overview of what changes when US stocks trade 23 hours a day.

The time-in-force rules are rewritten to match. Under amended Rule 4703(a), an order whose expire time is later than 8:00 p.m. is canceled at the end of the Day Session anyway, and an order marked System Hours Day, or SDAY, deactivates at 8:00 p.m. as it does today. Nasdaq runs the Night Session on a separate instance of its trading system with its own order-entry ports, so there is no technical path for an evening order to survive into the night on the same book.

The pause itself exists for housekeeping. The NYSE extended-hours FAQ (version 4.0, August 2026) says the one-hour break covers trade clearance, system maintenance, the processing of securities operations, and the move to the next trade date. The consolidated tape follows the same rhythm: the CTA Extended Trading Hours FAQ, updated September 29, 2026, ends the old session at 8:01 p.m. and starts the new one at 8:55 p.m. with fresh symbol reference data, halt status, and short sale restriction states. For how the 4 p.m.–8 p.m. evening session works before that cutoff, see hi2morrow's guide to how after-hours stock orders work.

Can you enter or cancel orders during the 8–9 p.m. pause?

Not at the exchange level on Nasdaq. Its approval order says the exchange will begin accepting Night Session orders at 9:00 p.m., the same moment trading starts, so there is no advance window to queue orders. Between 8:00 and 9:00 p.m., an order sent to Nasdaq has nowhere to rest, because the Day Session ports stop at 8:00 p.m. and the Night Session ports open at 9:00 p.m.

NYSE Arca, which runs the overnight session for NYSE-listed stocks, leaves a one-minute window. Under Rule 7.34-E(T)(a)(1), adopted in NYSE Arca's filing SR-NYSEARCA-2026-53, the exchange starts accepting orders at 8:59 p.m. for all of that trading day's sessions, not just the overnight one. Its systems perform end-of-day functions, a technical refresh, and a restart during the pause and will not accept orders at 8:30 p.m. Orders meant for the overnight session also carry a new trading session identifier. The same filing notes that Cboe has proposed an 8:55 p.m. queuing time for its EDGX exchange, so the exact moment an order can first reach a book will differ by venue.

A broker's app may still let you type an order at 8:30 p.m. What happens next depends on the broker: it may reject the ticket, hold it and release it when the overnight session opens, or queue it for the next premarket. That is a design choice of the firm, and the order confirmation should tell you which one applies. The weekly schedule adds two longer gaps. After 8:00 p.m. on Friday, nothing trades until 9:00 p.m. on Sunday, and there is no session on the evening before a weekday exchange holiday. According to the Nasdaq global trading hours FAQ, trading resumes at 9:00 p.m. on the evening of the holiday itself.

What happens to overnight orders at 4 a.m. ET?

The book is cleared a second time. Rule 4120(a)(10)(C) provides that all orders outstanding on the Nasdaq book at 4:00 a.m. are canceled when the Night Session ends, and the Nasdaq FAQ puts it in plain terms: orders entered between 9 p.m. and 4 a.m. that are still open at 4 a.m. are canceled and "may be re-entered at 4 a.m." in the next session. Premarket order entry keeps its current 4:00 a.m. start.

The expiry rules for overnight orders follow the same boundary. Under amended Rule 4703(a), an order entered during the Night Session with an expire time later than 4:00 a.m. expires at 4:00 a.m., and an SDAY order designated for the Night Session deactivates at 4:00 a.m. rather than at 8:00 p.m. the next evening. A trader who sets an overnight limit to "expire at 9:30 a.m." should therefore expect it to disappear from Nasdaq five and a half hours earlier.

The two sessions are also treated as separate environments. The Nasdaq FAQ notes that because the 9 p.m.–4 a.m. session is independent of the 4 a.m.–8 p.m. session, reference data, including stock locate code assignments, can change between them. On NYSE Arca, the first auction of the new day is the existing 4:00 a.m. Early Opening Auction, so an order that is canceled or expires overnight and is not resubmitted by then misses it.

Which time-in-force instructions work overnight?

Nasdaq keeps its time-in-force framework in the Night Session with two carve-outs based on the clock. Its FAQ says all time-in-force instructions are accepted between 9 p.m. and 4 a.m. except After Hours, On Open, and On Close, and every order entered in that window is canceled at the end of the session. The approval order also redefines "System Hours" as the 23-hour period from 9:00 p.m. on one calendar day to 8:00 p.m. on the next, which is the outer limit of any Nasdaq instruction that deactivates at the end of System Hours.

NYSE Arca is stricter about immediate-or-cancel orders. Under Rule 7.34-E(T)(c)(1)(B), a limit order marked IOC is accepted if it is entered during the Overnight Trading Session and rejected if it is designated for any other session. In other words, an IOC order cannot be parked at 8:59 p.m. for the morning; it has to be sent while the session it targets is running.

The order type has to qualify too: both exchanges reject market, pegged, and auction-only orders overnight.

What happens to day and GTC orders held by your broker?

The exchange cancellation applies to the exchange book, not to the instruction you gave your broker. A good-'til-canceled order is typically stored in the broker's own system and sent to a trading venue when a session in which it is eligible opens. When Nasdaq cancels that order at 8:00 p.m., the broker decides whether to send it again at 9:00 p.m., hold it until 4:00 a.m. or 9:30 a.m., or leave it canceled. As of September 2026, none of the exchange documents describes how brokers will handle this, and each broker's rules for day, extended-hours, and GTC orders remain its own policy.

The order type in your account screen is the practical test. Look for which sessions the order is eligible for, whether a GTC instruction covers extended or overnight hours, and what the broker's order history shows after 8:00 p.m. A status of "Open" in the app can mean the broker is holding the ticket rather than showing it on an exchange, which matters if you expect to be filled at 10 p.m.

Corporate actions add another reason to check. Pending SEC approval, the Nasdaq FAQ says stocks with splits, large dividends, symbol or CUSIP changes, spin-offs, or mergers will be halted from before 9:00 p.m. on the evening ahead of the effective date until 8:00 a.m. on that date. A GTC order in such a stock cannot trade overnight at all, and the corporate action itself can adjust or cancel it, as explained in hi2morrow's article on what happens to GTC orders after a stock split.

An evening-to-morning example with ABC

Assume ABC is a Nasdaq-listed stock and the date is Tuesday, December 8, 2026. At 2:00 p.m. you enter a limit sell for 100 shares at $60.00 as a regular-session day order. ABC never reaches $60.00, and the order expires at the 4:00 p.m. close. Had you marked it for extended hours with an SDAY instruction, it could have rested on Nasdaq's book until 8:00 p.m., but no longer: at 8:00 p.m. it would be canceled under Rule 4120(a)(10)(B).

At 11:00 p.m. that evening you enter a new limit buy for 100 shares at $58.50 in the overnight session, with an expire time of 9:30 a.m. on Wednesday. Because it is a Night Session order, Nasdaq treats 4:00 a.m. as its deadline. If it fills at 11:20 p.m., the $5,850 purchase (100 × $58.50) carries a trade date of Wednesday, December 9, since trades between 9 p.m. and midnight take the next calendar day's date, and settles on Thursday, December 10. If it does not fill, it is canceled at 4:00 a.m. on Wednesday, and you need to enter a new order from 4:00 a.m. to be in premarket trading.

A GTC order in ABC would face the same 8:00 p.m. and 4:00 a.m. cancellations on the exchange, and whether it comes back is decided by the broker that holds it.

Alexander Styopin's professional view: the 8 p.m. pause should be treated as a hard reset, not a short break. NYSE Arca's own filing expects thinner liquidity at 9:00 p.m., and the exchange opens the night with continuous trading rather than an auction, so an order resubmitted automatically at the first second of the session can meet a very different market from the one it was priced for. Before December 6, find out in writing how your broker treats GTC and extended-hours orders at 8 p.m. and 4 a.m., and in the first weeks read your order history each morning instead of assuming that yesterday's instructions are still working.

Educational material only. Not investment or legal advice. Session hours, order handling, time-in-force rules, and settlement can vary by exchange, broker, account type, and jurisdiction, and the launch schedule described here may change.

Author: Alexander Styopin, hi2morrow analyst and economist with 25 years of experience in the US stock market