1. The fund has a closed period, so after you confirm the investment, the money can't be sold, and you can sell it all after the closed period.

2. If the amount of your own investment fund is relatively large, the system is not allowed to sell it all, because the system may have some restrictions on the large amount. You can sell part of it every day, so you can sell it all in a few days.

3. Investors bought a part of the fund before redeeming the fund, but this part of the fund did not confirm the share, so when repurchasing the fund, investors can only redeem the previously purchased fund according to the share, and the unconfirmed part cannot be redeemed.

4. The redemption time of the fund does not belong to the trading time, so the fund cannot be completely sold.