Fund income is related to the purchase price. The lower the purchase price, the higher the selling price and the higher the fund income. This is the same as stocks. The purchase price determines the cost of investors. The lower the cost, the better for investors and the greater the profit probability.

In addition to monetary open-end funds, general funds are based on the net difference at the time of redemption or the difference at the time of trading to judge the income. The selling price is greater than the buying price, and the greater the difference, the greater the fund's income.