Which Order Types Work in the Overnight Stock Session?

Only limit orders will work in the overnight stock session that Nasdaq and NYSE Arca are scheduled to start on December 6, 2026, subject to the securities information processors being ready and to final exchange rule filings. Between 9 p.m. and 4 a.m. ET, both exchanges will reject market orders, pegged and midpoint orders, and orders aimed at the opening or closing auctions. Stop orders are not an exchange order type in this session at all, so whether a stop works overnight is your broker's decision. On Nasdaq, any overnight order still unfilled at 4 a.m. is canceled.

Can you place a market order in the overnight stock session?

No. A market order sent to either exchange for the overnight session will be rejected rather than queued for the morning. The SEC order approving Nasdaq's 23/5 rules, dated April 10, 2026, adds a line to Nasdaq Rule 4702(a) stating that unpriced orders are not permitted during the Night Session and that unpriced orders designated for it "will be rejected." NYSE Arca's Rule 7.34-E(T)(c)(1)(A) does the same for market orders designated for its Overnight Trading Session.

The reasoning is the same one that already keeps market orders out of most premarket and after-hours trading. With thinner liquidity and wider spreads, an order with no price can execute far away from where the stock last traded. On NYSE Arca the overnight session also starts with continuous trading rather than an auction, so there is no single opening price for an unpriced order to meet. In practice, every order entered between 9 p.m. and 4 a.m. has to carry a price you are willing to pay or accept, one of several changes covered in hi2morrow's overview of what changes when US stocks trade 23 hours a day.

Which order types does Nasdaq accept and reject overnight?

Nasdaq accepts all limit orders except pegged orders and orders directed to its opening and closing crosses. The Nasdaq global trading hours FAQ lists what will not be available for entry between 9 p.m. and 4 a.m.: market (unpriced) orders; Primary Peg, Market Peg, Midpoint Peg and Market Maker Peg orders; M-ELO and Supplemental orders; and the auction orders Market On Open, Limit On Open, Opening Imbalance Only, Market On Close, Limit On Close, Closing Imbalance-Only and Extended Trading Close. The SEC approval order adds Company Direct Listing orders, Midpoint Peg Post-Only orders and M-ELO+CB orders to the list.

Order attributes follow the same logic. The Pegging attribute, in its primary, market and midpoint forms, is unavailable at night, and the Discretion attribute may be used only if it is not combined with pegging; a discretionary order that also pegs is rejected. Everything that remains is a priced limit order of the kind Nasdaq already accepts in premarket trading, and the approval order says such orders will be ranked and displayed at their entered limit price, just as they are before 9:30 a.m. and after 4 p.m. today.

Routing is not switched off. The Nasdaq FAQ says routable orders will be accepted overnight through its smart routing strategies, such as STGY and SCAN, and through direct routes to exchanges that are open at that hour. A routed order is still a limit order; routing only decides where it looks for a fill.

Which order types does NYSE Arca reject in its Overnight Trading Session?

NYSE-listed stocks trade overnight on NYSE Arca, and its rules are written as a list of rejections. NYSE Arca's filing SR-NYSEARCA-2026-53, filed on May 12, 2026 as immediately effective, adds Rule 7.34-E(T)(c)(1). Market and pegged orders designated for the Overnight Trading Session are rejected, and Market Pegged and Discretionary Pegged orders cannot be entered before or during the session whatever session they are designated for. Market-on-open, market-on-close, limit-on-close, Primary Only and Directed orders designated for the session are rejected as well.

Two provisions deal with timing rather than type. Limit orders marked immediate-or-cancel are accepted if entered during the Overnight Trading Session and rejected if they are designated for execution in any other session, so an IOC order cannot be parked at night for the morning. Non-Displayed Limit, Midpoint Passive Liquidity, Tracking and Retail Price Improvement orders are rejected if entered before the session begins. NYSE Arca accepts orders from 8:59 p.m., one minute before the 9:00 p.m. start, and the filing notes that these rules copy the exchange's existing Early Trading Session, which also runs without an auction.

The exchange list is not the whole story, because an order has to get through a member firm first. Under NYSE Arca Rule 7.19-E, the firm entering the order, and a clearing firm it designates, can block orders from executing overnight. An order type that NYSE Arca accepts can therefore still be unavailable in a particular account, which is the same gap between exchange eligibility and broker settings that explains why an order can be rejected outside market hours.

What price protections apply to overnight limit orders?

A limit order can be rejected overnight simply because its price is too far from the market. Nasdaq applies Limit Order Protection under Rule 4757(c) in every session, including the Night Session. A buy limit is rejected if its price exceeds the national best offer plus the LOP limit, and a sell limit is rejected if it is below the national best bid minus that limit. The LOP limit is the greater of 10% of the reference price or $0.50.

Consider ABC, a Nasdaq-listed stock that closed at $40.00 on Monday, December 7, 2026. At 9:05 p.m. ET the overnight quote is $39.90 bid and $40.10 offered. A market buy for 100 shares is rejected. A limit buy for 100 shares at $40.20 is accepted, and if 100 shares are offered at $40.10 it can fill immediately for $4,010, a trade that carries Tuesday's trade date because it printed after 9 p.m. A limit buy at $45.00 is rejected, because the buy threshold is $40.10 plus 10% of $40.10, or $44.11. For a stock offered at $3.00, 10% would be only $0.30, so the $0.50 floor applies and the threshold is $3.50.

The $45.00 order in this example would still sit inside ABC's static overnight price bands under the LULD Plan amendment the SEC approved on August 5, 2026, which would run from $32.00 to $48.00 if the 7:45 p.m. reference sale were also $40.00. The two checks do different jobs: the bands limit where trades can print during the night, while Limit Order Protection screens each incoming order against the current quote. On NYSE Arca, the NYSE extended-hours FAQ says the exchange will keep applying its limit order price protection checks overnight at the same levels it uses in the early and late sessions, and member firms can opt into double-wide percentages of 20%, 10% and 6% for the Overnight, Early or Late sessions.

Do stop and stop-limit orders work overnight?

Not as an exchange feature. Neither Nasdaq's approval order nor NYSE Arca's overnight rules lists a stop order type for the session, which means a stop in your account is held by your broker and only becomes a live order when the broker's trigger fires. A plain stop turns into a market order when triggered, and a market order would be rejected overnight, so the realistic candidate is a stop-limit, which becomes a limit order once its stop price is reached.

Whether a broker triggers stops at night is its own policy, and the policies published as of September 2026 are restrictive. Charles Schwab's guide to stop orders says its stops trigger only during the standard 9:30 a.m.–4 p.m. ET session. Robinhood's extended-hours policy says stop orders will not execute during extended or overnight hours and that stop-limit orders placed then queue for the next regular open. At Interactive Brokers, an order has to be specifically set to be activated, triggered or filled outside regular trading hours, as its Outside RTH glossary describes. These are policies of individual brokers, not exchange rules, and brokers may revise them once the exchange session goes live.

The practical risk is a false sense of protection. A stop-loss entered during the day may simply sit dormant through a sharp overnight move and then trigger at or after the next morning's open, far from the stop price. hi2morrow's guide to why a stop-loss can fill below your stop after a gap explains that mechanism in detail.

Do good-till-canceled and day orders carry into the overnight session?

Not on the exchange's book. Nasdaq's FAQ says all time-in-force instructions will be accepted overnight except After Hours, On Open and On Close, but its approved rules set hard limits on how long any order can live. An order whose expire time is later than 8:00 p.m. is canceled at the end of the Day Session at 8:00 p.m., and an order entered in the Night Session whose expire time is later than 4:00 a.m. expires at 4:00 a.m. The FAQ adds that unfilled overnight orders may be re-entered at 4 a.m. for the following session.

A good-till-canceled order therefore survives only if your broker holds it and resubmits it for each session. Brokers that already run overnight trading show how this works in practice. Robinhood's 24 Hour Market takes whole-share limit orders only; its GTC orders there are eligible for execution around the clock on trading days for up to 90 calendar days, while Good-For-Day orders expire at 8 p.m. Schwab's extended-hours trading page says its 24-hour thinkorswim orders can be Day or GTC, with Day orders expiring at 8 p.m. ET. The time-in-force on your order ticket describes your broker's handling, not how long the order sits on the exchange's book.

Alexander Styopin's professional view: the overnight session forces a discipline that many traders skip during the day. Every order needs a price you can defend, and a protective stop cannot be assumed to be watching the position while you sleep. Before December 6, check three things with your broker: which order types it will send to the overnight session, whether stops or stop-limits trigger there, and what happens to an unfilled GTC order at 4 a.m. and again at 8 p.m.

Educational material only. Not investment or legal advice. Order types, time-in-force options, and session access can vary by exchange, broker, and account type, 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