🕘 Market hours and settlement: when you can trade and when it is final

🎯 In 30 seconds: The main US stock session runs 9:30 a.m. to 4:00 p.m. Eastern Time, Monday to Friday. Many brokers also let you trade before the open and after the close, when prices are thinner and jumpier. The exchanges close for about ten holidays a year and close early on a couple of days. Trades settle one business day later (T+1). As of October 2026, US exchanges plan to start overnight sessions on December 6, 2026, once the consolidated data feeds are ready.

The regular session

Regular trading hours for US-listed stocks are 9:30 a.m. to 4:00 p.m. Eastern Time (ET), Monday through Friday. If you live elsewhere, convert: that is 6:30 a.m. to 1:00 p.m. in California, for example.

Three moments in the regular session matter most:

• The open (9:30 a.m.). The listing exchange runs an opening auction that matches all the orders that built up overnight. Prices can jump to a very different level from the previous close, and the first 15 to 30 minutes are often the most volatile of the day.
• Midday. Usually quieter, with lower volume and smaller moves.
• The close (4:00 p.m.). The closing auction sets the official closing price used by index funds, mutual funds and most charts. Volume often surges in the last minutes.

The official close does not move after 4:00 p.m. Trades in extended hours do not change it, which is why a stock can "close" at $50 and be trading at $46 an hour later.

Pre-market and after-hours

Trading outside regular hours is called extended-hours trading. Exchange schedules and broker offers vary, so check what yours supports:

• Pre-market: some exchanges, such as NYSE Arca, open as early as 4:00 a.m. ET. FINRA describes pre-market trading as typically 7:00 to 9:30 a.m. ET, and many brokers start somewhere in that window.
• After-hours: usually 4:00 to 8:00 p.m. ET.

Most company earnings reports come out just before the open or just after the close, so extended hours are when the biggest news-driven moves often start.

FINRA lists the main risks of extended-hours trading:

• Less liquidity. Fewer buyers and sellers, so your order may fill only partly or not at all.
• Wider spreads and worse prices. The gap between bid and ask is usually much wider than during the day.
• More volatility. Thin trading means a few orders can move the price a lot.
• Prices that differ between venues. The protections that link quotes across exchanges during regular hours do not fully apply, so you might get a worse price on one system than another.
• Order limits. Many brokers accept only limit orders in extended hours.

Worked example: an after-hours earnings move

Hypothetical. Company Z closes at $50.00 at 4:00 p.m. At 4:05 p.m. it reports weaker sales than expected.

If you held 100 shares and sold at the 4:20 p.m. bid, you got $4,380. If you waited for the open, $4,510. If you had a stop order at $48, it would not have helped: many brokers do not trigger stop orders in extended hours, and at the open it would have triggered and sold around $45. This is a gap, and no ordinary order type protects you from one. See Breakouts and gaps and Stop losses.

Overnight trading: where it stands in October 2026

Trading through the night on weekdays already exists in a limited form. Some brokers offer it through alternative trading systems (ATSs) for a list of popular stocks and ETFs. FINRA describes overnight trading as roughly 8:00 p.m. to 4:00 a.m. ET and notes it has more recently become available to retail investors for certain stocks. It is still small: an August 2026 SEC order cited data showing overnight trading made up less than 1% of total daily volume in April 2026.

Exchanges are preparing to join in. As of October 2026:

• The SEC approved changes in June 2026 that extend the consolidated market data feeds (the SIPs) to 23 hours a day, 5 days a week, with a required start date of December 6, 2026.
• Several exchanges have approved rules for overnight sessions that can start once the SIPs are ready. 24X National Exchange, for example, plans a session from 9:00 p.m. to 4:00 a.m. ET on nights before a business day.
• In May 2026 the SEC approved rules letting the NSCC clear trades done in extended hours.
• As a backup, the SEC said that if the SIPs miss the December 6 date, 24X may start overnight trading from January 24, 2027 under temporary conditions.

Dates like these can slip. If you are reading this after December 2026, check your broker and the exchange notices for what is actually live. Either way, the risks of extended hours apply even more strongly overnight, when news from other time zones arrives and very few people are trading.

Holidays and half days

US stock exchanges close for these holidays (NYSE schedule; Nasdaq follows the same calendar):

Early closes in 2026: Friday, November 27 (the day after Thanksgiving) and Thursday, December 24 both close at 1:00 p.m. ET. Volume on half days is usually light.

Some days are bank holidays but not market holidays, such as Columbus Day and Veterans Day. Stocks trade, but the settlement system follows the banking calendar, so trades on the day before may take an extra day to settle. Your broker's calendar will show it.

Settlement: T+1

Settlement is the official handover: the shares go to the buyer's account and the cash to the seller's. The day you trade is the trade date, "T". Since May 28, 2024, the standard settlement cycle for most US stock trades is T+1, one business day after the trade. Before that it was T+2.

Why it matters to you:

• Cash from a sale is not instantly yours. In a cash account, buying with money from a sale that has not settled, then selling again before it settles, can trigger a good faith violation. See The rules every trader runs into.
• Withdrawals wait for settlement. Sell on Friday, and the money is not settled until Monday, before your broker even starts the bank transfer.
• Dividends depend on settlement timing. To get a dividend you must own the shares by the record date, which is why the ex-dividend date matters. See Dividends, splits and buybacks.

Try it

Pick one stock on your Watchlist that reports earnings this month (check the earnings calendar). Note its 4:00 p.m. close, its after-hours bid and ask around 5:00 p.m., and its opening price the next morning. Work out the spread after hours versus during the day, and the gap from close to open. Then answer: would a stop order have protected you?

Sources

• NYSE: Holidays and trading hours
• FINRA: Extended-hours trading, know the risks
• Investor.gov (SEC): New T+1 settlement cycle, what investors need to know
• SEC: Order granting temporary conditional exemptive relief to 24X National Exchange (Release 34-106061, August 7, 2026)