A result can be shared with you. The actuary of our company has calculated with big data. There is a 70% probability that a fund with a similar ranking of 1/3 will still be in the post 1/3 in the next1year, so it is necessary to choose a good fund at the beginning. For those poor funds, after you sell them, it will cost more to free up money to get opportunities. In the long run, investing in a good stock fund and sticking to it for a long time will have good returns.