Most stocks can be bought and sold during the trading days and hours of the US stock market. Some stocks can also be traded outside these hours. This is called off-hours trading. The app shows which stocks are available for off-hours trading.
Please note:
Outside normal market hours, prices may be less favorable, and the difference between the buying and selling price may be larger.
Trading in a stock may be paused at any time, for example during market disruptions or important company events.
If a stock is not available for trading, you cannot buy or sell it until trading resumes.