The rate of return of open-end funds can be reflected in two parts, one is the growth of the fund's net value, and the other is the dividend of the fund. An approximate formula for calculating the annual return of funds is: annual return of funds = (net fund share at the end of the year-net fund share at the beginning of the year)/(net fund share at the beginning of the year-dividend at the beginning of the year) * 100% Generally speaking, the higher the return on investment, the higher the efficiency of fund assets operation, the better the fund performance and the higher the income of fund investors. However, the good realization of the fund may be due to the good management of the fund manager, or a very good market trend, or the investment risk is particularly high, so you need to compare the performance of a single fund with multiple standards in order to fairly judge the performance of the fund: compared with the trend of the stock market. If a fund outperforms the market index most of the time, it should be said that its management is effective, and the fund management company has excellent research and investment capabilities. Compared with other similar funds. Different types of funds should be treated differently. Due to different risks, it is impossible to directly compare the performance of different types of funds. Compared with expectations. According to the investment principles of the fund and the operating philosophy of the fund manager, see if the fund performance meets your expectations. Compare history. Only stable performance is the real performance, occasional success may be just luck, and occasional loss may be only temporary. You should comprehensively judge the performance of the fund from a long-term perspective.