First of all, using the data of fund research institutions, compare the performance of funds with the same investment style in recent five years.
Secondly, set a standard, such as the five-year minimum income or the star rating of the fund evaluation.
Third, avoid those funds that perform extremely well in a certain year and then go into obscurity. Unless these funds are higher than this level every year.
2. Know the fund manager: When you invest in a fund, you actually invest in a fund manager, which is his team. The latter determines the investment direction and specific target of the fund. So we must consider how many years the fund manager has worked in this position. If the time is short, it depends on the performance of the fund he controls in a short time.
It should be noted that don't fall in love with a fund casually. If the performance of your fund becomes poor, you need to re-evaluate its value. If the conclusion is that you won't buy the fund you hold now, you should sell it and exchange it for a better one. At the same time, pay attention to the comparison of similar funds.