Open-end funds can be bought and sold at any time during normal trading hours, but closed-end funds can't, and there are prescribed trading hours. The same fund cannot be traded on the same day, nor can it be traded outside trading hours. Trading hours are: Monday to Friday, 9: 30 am-11:30 pm-1: 00-3: 00 pm, except legal public holidays.
The share of open-end funds changes at any time, but the share of closed-end funds is fixed, and it will be gone after the subscription.