Fund transactions are subject to subscription fee, redemption fee and operation fee. Take Boss Mix A as an example, the subscription amount is less than 500,000, the subscription rate is 0. 15%, the holding days are more than or equal to 7 days and less than 730 days, the selling rate is 0.5%, and then the annual management fee is10.5%, and the custody fee is 0.25%. 0.15%+0.5%+1.5%+0.25% = 2.4%, which means that the expected rate of return of the fund is greater than 2.4%, then it is profitable.