The high subscription, subscription and redemption costs of open-end funds have been puzzling many investors. The net value of the fund has increased by 2%, which should make money. After the actual redemption, it can be settled. Except for the expensive subscription and redemption fees, almost nothing is earned, and investors are busy in vain. The biggest advantage of online direct selling is the preferential rate. The subscription fee for online direct sales of most funds can be discounted by 40%. In this way, the subscription fee and redemption fee of the fund add up to about 1%, and the actual profit space of investors will increase. Fund conversion can also be carried out through online direct sales channels, and the rate is much lower than that of consignment channels. If you master the tricks, you can also enjoy the treatment of buying funds for free. At present, most fund companies upgrade and improve their online trading systems, and have successively introduced measures of preferential rates, thus attracting more small and medium-sized investors and bringing a win-win situation to fund companies and citizens.