你可以隨時設個order買或賣Mutual funds, 但這個買賣要到股市收盤後才能執行.

"You can enter an order to buy or sell mutual fund shares at any time, but your trade won't be executed until the closing of the current trading session or the next trading session if you place your order after hours. The price you realize will be the NAV that is calculated after the market closes."

https://www.schwab.com/learn/story/6-things-to-know-about-how-mutual-funds-work#:~:text=You%20can%20enter%20an%20order,calculated%20after%20the%20market%20closes.?