The most important index to measure the fund's rate of return is the rate of return on fund investment, that is, the ratio of the actual income of fund securities investment to the investment cost. The higher the return on investment, the stronger the profitability of fund securities. If the subscription and redemption of fund securities need to pay a handling fee, the handling fee factor should be considered in the calculation.

Folding calculation formula

Income = fund net value of the day × fund share ×( 1- redemption fee)-subscription amount+cash dividend.

Rate of return = income/subscription amount × 100%

Folding cumulative net value

The accumulated net value can not accurately reflect the fund's income, because the fund can choose cash when paying dividends, or it can choose to reinvest the dividends automatically. If you choose cash, you can also choose to buy it manually in a few days or months. Cumulative net worth is a simple reduction, which can be used as an indicator if accurate calculation is not needed.