The fixed investment income of the fund is mainly the change of the net value of the fund. When the net value of the fund rises, the investment income rises, and when the net value of the fund falls, the investment income falls.

The fixed investment of the fund is to buy the fund at a fixed amount. When the net value of the fund falls, the same money can buy more fund shares and the purchase cost will be lower. When the fund rises, the more fund shares, the more fund income. The more the fund falls, the more cost-effective.