After the fund company receives a huge redemption application, there are two ways to deal with it, one is full redemption and the other is partial redemption.
In fact, if institutions or individuals want to redeem a lot at one time, they will generally communicate with fund companies and notify them in advance, because in most cases, such funds with a high share of single holders are specially tailored for some institutions.
However, as an ordinary investor, it is often after the huge redemption occurs and the fund company handles it that the fund has been redeemed from some public data. The public data here can be the sharp rise and fall of net worth and the sharp change of net assets.