What is the US stock overnight session?
The overnight session refers to the trading period from 20:00 to 3:50 Eastern Time (ET) the next day, marking the start of the next trading day. Pre-market, regular trading, after-hours, and overnight sessions form the 24-hour trading system for the US stock market, supporting select stocks and ETFs.
1. Introduction to the US stock overnight session
The overnight session operates from 20:00 to 3:50 ET the next day.
The first overnight session of the week begins at 20:00 ET on Sunday and ends at 3:50 ET on Monday, while the last session runs from 20:00 ET on Thursday to 3:50 ET on Friday.
The overnight session marks the start of a trading day; the session beginning at 20:00 ET is attributed to the next trading day. For example, the overnight session from 20:00 ET on Monday to 3:50 ET on Tuesday is part of Tuesday's trading day. Pre-market, regular trading, after-hours, and overnight sessions form the 24-hour trading system for the US stock market.
Time Zone | Overnight Trading | Pre-Market | Regular Trading Hours | After-Hours |
|---|---|---|---|---|
Eastern Time | From Sunday to Thursday | From Monday to Friday | ||
20:00 - 3:50(+1) | 4:00 - 9:30 | 9:30 - 16:00 | 16:00 - 20:00 | |
HK Time - Daylight Saving Time | 08:00 - 15:50 | 16:00 - 21:30 | 21:30 - 04:00(+1) | 04:00 - 08:00 |
HK Time - Standard Time | 09:00 - 16:50 | 17:00 - 22:30 | 22:30 - 05:00(+1) | 05:00 - 09:00 |
2. Underlying varieties eligible for overnight trading
The varieties available for overnight trading include stocks and ETFs. You can identify whether a variety supports overnight trading by checking the 24H label on its details page. The range of varieties eligible for overnight trading will continue to expand.
3. How to access overnight trading market data
When overnight trading begins, you can view the overnight trading snapshots, intraday chart, trade details, trade statistics, and top bid/ask quotes.
4. Order rules and types for overnight trading
Overnight trading only supports limit orders, which are valid for the current trading day only.
Currently, there are two ways to place overnight trading orders:
- On the trading floor, select the overnight session and proceed with order placement.
- In the quick trade interface, enable the overnight trading icon and proceed with order placement.
5.Calculation for positions and profits/losses (P&L) during overnight trading
You can choose whether to use overnight prices by navigating to Settings > Portfolio Settings > Asset calculation method. When overnight prices are enabled, the latest prices during overnight sessions will affect your positions and P&L calculations.
Key takeaways:
- Trading hours: The overnight session runs from 20:00 to 3:50 ET the next day, starting Sunday night and ending early Friday morning. Sessions are attributed to the next trading day.
- Eligible varieties: Available for select stocks and ETFs—identified by the 24H label on the details page. Coverage is continuously expanding.
- Market data: After overnight trading begins, you can access intraday charts, trade details, top bid/ask quotes, and more.
- Trading method: Only limit orders are supported, with day-only validity. Orders can be placed by enabling the overnight mode through the trading floor or quick trade.
- P&L calculation: You can choose whether to calculate the position P&L based on the latest overnight price underSettings > Portfolio Settings > Asset calculation method.
Notes
- Overnight trading is conducted over-the-counter (OTC), and upstream brokers may impose price restrictions on overnight orders.
- If a stock involved in overnight trading has corporate actions within a 3-day window, orders may be rejected by the upstream broker.
- The stock may be unavailable for overnight trading on the day of the corporate action, as well as the days before and after.
- Overnight trading only supports universal accounts.
- Due to generally lower liquidity and higher price volatility during overnight sessions, as well as potential restrictions from upstream securities companies and exchanges, your orders may be partially filled or not filled at all. Please be aware of the associated risks.
FAQs
Q1: Is overnight trading available during US holidays?
Overnight trading follows the exchange holiday calendar. Trading days for overnight sessions align with regular trading days, and no overnight trading occurs on holidays.
For example, if Friday is a holiday, there will be no overnight trading on Thursday night/Friday morning.
Q2: Do I need to open an additional account the overnight trading?
No additional account is required for overnight trading. As long as your account is enabled for US stock trading, you can participate in overnight sessions.
Q3: What are the service fees for overnight trading?
Service fees are the same as during regular trading hours.
Q4: Is short sale allowed during overnight trading?
Yes, short sale is supported.
Q5: Can orders be placed in advance for overnight trading?
No, orders can only be placed during the overnight session.
This article is for reference only and does not constitute any investment advice.
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