The fund manager's income source has nothing to do with the fund's profit and loss, because the fund's income source comes from management fees, that is to say, the fund helps customers manage funds, and the fund manager pays labor, so investors need to pay the fund management fee regardless of whether the fund's investment is profit or loss.
Therefore, if the fund manager makes a mistake and loses money, the investor will bear the loss. The management fee fund is still charged as usual. This is what investors must be clear about.