A: If you want to buy a fund with 400,000 yuan, I don't think you should make a fixed investment or make a one-time investment. First of all, you should find some promising industries that will develop well in the future, and then choose some fund companies with relatively large scale and good reputation. Only in this way can you ensure the steady growth of your investment. If you want to invest in four funds, you can invest 20 thousand yuan in each fund first. Be sure to add positions every time the fund falls, and add positions according to the remaining funds when it falls by one point. Only in this way can the cost be reduced. Maximize income