You can buy and sell stocks on U.S. exchanges Monday through Friday from 9:30 AM to 4:00 PM Eastern Time, with optional pre-market trading starting as early as 4:00 AM ET and after-hours trading running until 8:00 PM ET. Markets close on weekends, on about nine federal holidays a year, and early (1:00 PM ET) on a couple of days around Thanksgiving and Christmas. Beyond the clock, several rules affect when a trade is practical: settlement timing, cash-account restrictions, the pattern day trader threshold, and how long you hold a position before selling.
Regular Trading Hours
The New York Stock Exchange and Nasdaq both run their main sessions from 9:30 AM to 4:00 PM ET on weekdays.1NYSE. Holidays and Trading Hours This is when nearly all volume trades and when spreads between bid and ask prices are tightest. A market order placed during these hours will almost always fill near the quoted price.
The first and last 30 minutes are the most active. At 9:30 AM, overnight orders pile in at once and prices can swing sharply in the opening minutes. The stretch before 4:00 PM sees another surge as institutional investors and index funds rebalance. The midday window, roughly 11:00 AM to 2:00 PM, is generally the calmer part of the session.
One deadline inside the regular session catches people who use closing-price orders: Market on Close and Limit on Close orders on the NYSE must be submitted by 3:50 PM ET. After that cutoff, they cannot be modified or canceled.2NYSE. NYSE Opening and Closing Auctions Fact Sheet
Pre-Market and After-Hours Trading
You can also trade before and after the regular session. Nasdaq’s pre-market session runs 4:00 AM to 9:30 AM ET, and after-hours trading runs 4:00 PM to 8:00 PM ET. The NYSE’s extended hours vary by sub-market, but the broadest window matches: 4:00 AM to 8:00 PM ET.3FINRA.org. Extended-Hours Trading Know the Risks
These sessions match orders electronically rather than through the auction process used in regular hours. Fewer participants means less liquidity, wider spreads, and prices that can jump several percent between trades. Most brokers require limit orders during extended sessions for that reason.
There is also a protection you lose after 4:00 PM. During regular hours, your broker is generally required to fill your order at the best price available across exchanges, known as the National Best Bid and Offer. That obligation does not apply in extended sessions, so the quote you see on one platform may be worse than what is available elsewhere, and your broker is not required to find the better price.3FINRA.org. Extended-Hours Trading Know the Risks Extended hours are useful when earnings or economic data land outside the regular session, but the added risk is real.
Days the Market Is Closed
Both exchanges close on weekends and on specific federal holidays. For 2026, the full closures are:
- New Year’s Day — January 1
- Martin Luther King Jr. Day — January 19
- Washington’s Birthday — February 16
- Good Friday — April 3
- Memorial Day — May 25
- Juneteenth — June 19
- Independence Day (observed) — July 3
- Labor Day — September 7
- Thanksgiving — November 26
- Christmas — December 25
Two 2026 dates end trading early, at 1:00 PM ET: the day after Thanksgiving (November 27) and Christmas Eve (December 24).1NYSE. Holidays and Trading Hours4Nasdaq Trader. US Equity and Options Markets Holiday Schedule 2026 If you need to place a trade on one of those afternoons, plan for it before lunch.
When Trading Pauses Mid-Session
Trading can be interrupted even during regular hours. Two systems trigger pauses: one for individual stocks, one for the whole market.
Individual Stock Halts
The Limit Up-Limit Down mechanism keeps a single stock from moving too far too fast. When a stock hits its upper or lower price band, exchanges enter a 15-second pause. If it does not trade back inside the bands, the primary exchange declares a five-minute halt. If the stock still cannot reopen after 10 minutes, other venues can resume trading on their own.5Nasdaq Trader. Limit Up-Limit Down Frequently Asked Questions
Market-Wide Circuit Breakers
Sharp drops in the S&P 500 pause the entire market at three levels:
- Level 1, a 7% decline: trading halts for 15 minutes if triggered before 3:25 PM ET.
- Level 2, a 13% decline: trading halts for 15 minutes if triggered before 3:25 PM ET.
- Level 3, a 20% decline: trading halts for the rest of the day, whenever it is triggered.
The thresholds are recalculated each morning against the prior day’s close.6U.S. Securities and Exchange Commission. Investor Bulletin New Measures to Address Market Volatility A Level 1 or Level 2 decline after 3:25 PM does not trigger a halt, on the reasoning that the market is close enough to its natural close.
Settlement and Cash-Account Timing
When a trade fills, the transfer of shares and cash is not instant. Under SEC Rule 15c6-1, U.S. stock trades settle on T+1, meaning settlement completes the next business day after the trade date.7eCFR. 17 CFR 240.15c6-1 Settlement Cycle Your account will show the trade right away, but the cash is not technically available to withdraw until settlement completes.
This gap matters in cash accounts (not margin accounts). Two violations can restrict what you can do:
- Freeriding, under Federal Reserve Regulation T, happens when you buy a stock and sell it before paying for the purchase. The broker must freeze the account for 90 days. You can still buy during that period, but only with fully settled cash on the trade date.8U.S. Securities and Exchange Commission. Freeriding
- A good faith violation happens when you buy a stock with unsettled proceeds and then sell that stock before the original proceeds settle. Three within 12 months typically results in a 90-day restriction requiring settled cash for every purchase.
These rules mostly affect active traders in cash accounts who cycle in and out of positions faster than settlement can keep up. Infrequent traders and margin-account users rarely run into them.
Pattern Day Trader Rule
If you make four or more day trades within five business days, and those trades are more than 6% of your total trades in a margin account during that window, your broker will classify you as a pattern day trader.9FINRA.org. Day Trading A day trade means buying and selling the same security on the same day.
Once classified, you must keep at least $25,000 of equity in the margin account at all times. That balance can mix cash and eligible securities, but it has to be in the account before you place any day trades. Drop below $25,000, and the broker will block further day trading until you restore the balance.9FINRA.org. Day Trading Most firms keep the pattern day trader designation on the account even if you stop day trading.
How Selling Timing Affects Your Taxes
When you sell also affects what you owe. The IRS treats a stock held for one year or less as short-term, and any profit is taxed at your ordinary income rate. Hold for more than one year and the gain is long-term, taxed at 0%, 15%, or 20% depending on your income.10Internal Revenue Service. Topic No 409 Capital Gains and Losses The holding period starts the day after purchase and includes the day of sale.
For 2026, a single filer pays 0% on long-term gains up to $49,450 of taxable income, 15% between $49,451 and $545,500, and 20% above that. The difference between selling at 12 months and selling at 13 months can be substantial on a large position.
One more timing rule governs losses. If you sell a stock at a loss and buy the same or a substantially identical security within 30 days before or after the sale, the wash sale rule disallows the loss deduction.11Internal Revenue Service. IRS Courseware Capital Gain or Loss Workout The disallowed amount is added to your cost basis in the replacement shares, so you eventually recover it when those shares are sold, but you cannot use the loss to offset gains in the current tax year if you re-enter the position too quickly.