The fund's fixed investment is of course reliable. Fund investment mainly realizes income through long-term investment. Fixed investment is every month or week. Invest a fixed amount of money. If the fund price is low, you will buy more stocks. When the fund is expensive, you buy fewer stocks. It is ok to buy fund shares through this high and low position. Get an average price and make a profit. But this long-term investment is at least one year. In fact, you can also think of it as saving money. And let you have a good financial habit.