The calculation formula is as follows: net asset value of the fund on day T = total assets of the fund on day T-total liabilities of the fund on day T, where the total assets of the fund refer to the market value of various assets owned by the fund (including stocks, bonds, bank deposits and other securities). ) calculated at fair price; Total liabilities refer to liabilities formed in the course of fund operation, such as custody fees, management fees, interest payable, income payable, etc. Net value of fund shares on T day = net value of fund assets on T day/total number of fund shares issued externally on T day. Because the total number of open-end fund shares changes every day, the data confirmed by the registration and transfer system on that day shall prevail. After the close of each trading day, the net asset value of the fund on that day is divided by the total number of fund shares at the close of the trading day to get the net asset value of the fund on that day. Because the value of assets owned by the fund always changes with the fluctuation of the market, the net value of fund shares will also change constantly. The key to determine the increase or decrease of the fund's net asset value is the rise or fall of the securities market invested by the fund and the operation of the fund manager.