When placing an order, investors can choose its validity period.
The order is active until the end of relevant trading sessions on the day it is placed. Unfilled orders will be cancelled afterwards.
The order will continue to be valid until the order is fully filled, cancelled or failed. Unfilled orders will be cancelled at end of the next calendar quarter.
US stock trading hours include the pre-market trading session, the continuous trading session, and the after-hours trading session. When placing a pending order, investors can choose whether to allow it to be active in the pre-market and after-hours trading sessions, i.e., whether to allow fill outside regular trading hours (RTH).
Orders can be matched in the pre-market and after-hours trading sessions as well as in the continuous trading session. Unfilled orders in the pre-market trading session will be automatically transferred to the continuous trading session, and unfilled orders in the continuous trading session will also be automatically transferred to the after-hours trading session.
Orders can be matched only in the continuous trading session.
| Time in Force | Fill outside RTH | Order is active |
| Day | Allow | Until the end of the after-hours trading session on the day it is placed. |
| Day | Prohibit | Until the market close on the day it is placed. If it is placed in the after-hours trading session, it will be reserved until the market close of the next trading day. |