Funds can be bought and sold at any time, but investors are generally advised to trade funds a few minutes before the close, because transactions before three o'clock are calculated according to the net value at the close of the day. You can know the ups and downs of the fund one day by looking at the estimated net value of the fund. You can buy when the fund falls, but you can't buy when the fund rises. Similarly, the fund can be sold when it goes up, and it can not be sold when it goes down.

Fund trading hours: Monday to Friday, 9: 30am-1:30am, afternoon13: 00pm-15: 00pm, and trading is not allowed on legal holidays.