The net cost of the fund is also called the net value of the fund unit, that is, the net asset value of each fund unit is equal to the balance of the total assets of the fund MINUS the total liabilities divided by the total number of units issued by the fund. The subscription and redemption of open-end funds are carried out at this price.

The calculation formula is: net asset value of fund share = (total assets-total liabilities)/total fund share. Among them, total assets refer to all assets owned by the fund, including stocks, bonds, bank deposits and other securities; Total liabilities refer to liabilities arising from fund operation and financing, including various expenses payable to others, interest payable on funds, etc. The total number of fund shares refers to the total number of fund shares issued at that time.