After-hours trading is the buying and selling of stocks after the regular U.S. stock market session has closed. For most U.S.-listed stocks, the standard after-hours session runs from 4:00 p.m. to 8:00 p.m. Eastern Time, although the available securities, order types and trading hours vary by broker. (FINRA)
After-Hours Trading at a Glance
| Trading Session | Typical U.S. Hours | What It Means |
|---|---|---|
| Regular session | 9:30 a.m. to 4:00 p.m. ET | The main stock market session |
| After-hours session | 4:00 p.m. to 8:00 p.m. ET | Trading after the regular market closes |
| Overnight session | Often 8:00 p.m. to 4:00 a.m. ET | Available for some stocks through certain brokers and trading venues |
After-hours, overnight and pre-market trading are all forms of extended-hours trading. Nasdaq lists its pre-market session as 4:00 a.m. to 9:30 a.m. ET and its after-hours session as 4:00 p.m. to 8:00 p.m. ET. (Nasdaq)
How Does After-Hours Trading Work?
After the regular exchanges close, investors with participating brokers can submit orders. A broker may route an order to an electronic trading venue or alternative trading system instead of matching it through the regular-session market structure. (FINRA)
Companies often release earnings reports, merger announcements and other news after 4:00 p.m. Investors may use after-hours trading to respond before the next regular session begins.
For example, if a company reports disappointing earnings at 4:05 p.m., investors may place sell orders during the after-hours session. The stock price could fall before regular trading resumes the next morning.
Is After-Hours Trading the Same as Regular Trading?
No. After-hours trading has different market conditions and investor protections.
| Feature | Regular Trading | After-Hours Trading |
|---|---|---|
| Trading activity | Generally higher | Generally lower |
| Bid-ask spreads | Usually narrower | Often wider |
| Order execution | More likely to fill quickly | May fill partially or not at all |
| Price stability | Usually more orderly | Often more volatile |
| Market connectivity | Prices are consolidated through regular market systems | Prices can differ between trading venues |
| Order types | More order types may be available | Many brokers restrict trading to limit orders |
The National Best Bid and Offer, commonly called the NBBO, is generally available during regular trading hours. The same consolidated pricing protection does not apply in the same way during extended hours. One trading venue may show a worse price than another venue trading the same stock. (FINRA)
What Are the Main Risks of After-Hours Trading?
Lower Liquidity
Fewer buyers and sellers participate after hours. An order may execute only partially or may not execute at all. Some stocks have little or no trading activity outside regular market hours. (SEC)
Wider Bid-Ask Spreads
The bid is the highest price a buyer is offering. The ask is the lowest price a seller will accept. The difference between them is the spread.
Lower trading activity can lead to wider spreads. Buying may cost more, while selling may produce less than it would during regular market hours. (SEC)
Higher Volatility
After-hours prices can move sharply when investors react to earnings, economic data or company announcements. With fewer trades taking place, a relatively small number of orders can cause a large price movement. (FINRA)
Prices Can Change Before the Market Opens
An after-hours price does not guarantee the next day's opening price. New information, overnight trading and additional orders can cause the stock to open substantially higher or lower than its after-hours price. (FINRA)
Fragmented Pricing
After-hours markets are not always fully linked. The price shown by one broker or trading venue may not be the best available price elsewhere. (FINRA)
Does After-Hours Trading Change the Official Closing Price?
No. For U.S. stocks, the official regular-session closing price is generally the price established at 4:00 p.m. ET. After-hours trades are reported separately and do not change the regular-session closing price or regular-session high and low.
Financial websites may display an after-hours price separately. That is why different platforms can appear to show different "closing prices."
What Order Should You Use After Hours?
Many brokerage firms accept only limit orders during after-hours trading. A limit order sets the maximum price you will pay when buying or the minimum price you will accept when selling. (SEC)
A limit order helps control the execution price, but it does not guarantee that the trade will be completed. If the market does not reach your limit price, the order may remain unfilled.
Before placing an order, check:
- Whether your broker offers after-hours trading.
- The broker's exact trading times.
- Which stocks are eligible.
- Whether market orders are prohibited.
- Whether unfilled orders expire or carry into the next session.
- Which trading venue will receive the order.
Brokerage firms can set different trading hours, venue restrictions, product limits and order-handling rules. (FINRA)
Is After-Hours Trading Suitable for Beginners?
For most beginners, regular trading hours are the better default. Regular hours generally offer more liquidity, narrower spreads and more competitive price discovery.
After-hours trading may help an investor respond to major news, but the risks are higher. Orders may not fill, spreads may be wider and prices may move more sharply. This makes after-hours trading less forgiving for people who are still learning how orders work.
After-hours trading is a specialized session, not simply a longer version of the normal market day.