The reason why the fund has been falling is because the market of the fund is not good. For example, if it is a stock-based fund, the stock invested will fall, so will the fund, but it does not mean that the fund will still be managed by the fund manager without the management of the fund manager.

If the fund has fallen much, we should find the reasons for the decline and see if there is any prospect for the fund. If the fund has no prospects and investors are not optimistic, then stop loss in time. If the fund still has prospects, it can take a wait-and-see attitude or redeem some fund shares.