The cost price of fund position is calculated by deducting the handling fee from the net value when buying the fund. The calculation formula is = {(net fund subscription value * fund share)-handling fee}/fund share. Generally speaking, if the net value of the fund is higher than the cost price of the position, the investor is profitable. If the net value of the fund is lower than the cost price of the position, the investor will lose money.

According to different standards, securities investment funds can be divided into different types:

(1) According to whether the fund unit can be increased or redeemed, it can be divided into open-end funds and closed-end funds. Open-end funds are not traded on the market (as the case may be), but are purchased and redeemed by banks, brokers and fund companies, and the fund scale is not fixed; Closed-end funds have a fixed duration and are generally listed and traded on the stock exchange. Investors buy and sell fund shares through the secondary market.

(2) According to different organizational forms, it can be divided into corporate funds and contractual funds. A fund is established by issuing fund shares to establish an investment fund company, which is usually called a corporate fund; The establishment of fund managers, fund custodians and investors through fund contracts is usually called contractual funds. China's securities investment funds are all contractual funds.

(3) According to the different investment risks and returns, it can be divided into growth funds, income funds and balanced funds.

(4) According to different investors, it can be divided into four categories: money fund, bond fund, mixed fund and stock fund.