1. covering positions: closed-end funds operate in a closed way, and covering positions is only applicable to closed-end funds after listing and trading. Investors can make up their positions by opening stock accounts or on-site fund accounts.

2. Cut the meat: If investors think that the fund is weak and its performance is not good, the stocks they invest in will continue to fall, then they can sell all the funds. This situation can only be operated after closed-end funds are listed and traded.

3. Changing positions: Investors believe that the fund will continue to fall in the later period, and they can buy a fund that is stronger than it to make up for the losses.