Trading Rules
Trading hours of US stocks
How to place an order for US stocks
How to modify or cancel an order
What are time in force and pre-market & after-hours trading
Whether use the pre and post-market price to calculate the market value and profit or loss of your position
Why should the placement of market orders be restricted
What is penny stock
Can US stocks trade intraday/Can I sell US stocks the same day I bought them
Why was my sell order with an order price lower than the best ask price not filled
US stock market holidays
Why use pre- and post-market prices to calculate market capitalization and profit & loss of stocks during the respective session
Withholding Tax on Publicly Traded Partnerships (PTP) Securities and Trading Arrangements
Fractional shares trading in the US stock market
Order Type
US Stock Option
US Index Option
When placing a pending order, investors can choose its validity period. Choices include Day and Good-Til-Cancelled (GTC).
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 is active until it is fully filled or cancelled. Investors can place a pending order at an ideal price in advance.
Note: The order can remain active for up to 90 natural days, and will be automatically cancelled after it expires.
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. |
GTC | Allow | Until it is fully filled or cancelled. And it can be filled in any of the pre-market trading session, the continuous trading session, and the after-hours trading session. |
GTC | Prohibit | Until it is fully filled or cancelled. But it can be filled only in the continuous trading session. |
Moomoo is a professional trading app offered by Moomoo Technologies Inc. In the U.S., investment products and services on moomoo are offered by Moomoo Financial Inc., Member FINRA/SIPC.
Any illustrations, scenarios, or specific securities referenced herein are strictly for illustrative purposes. Past investment performance does not guarantee future results. Investing involves risk and the potential to lose principal.