The real reason for the large fluctuation of fund net value may be that a fund has suffered huge redemption. Due to the huge redemption amount, there may be a large redemption fee income, which usually belongs to the fund assets and is a compensation mechanism for the interests of the remaining citizens.

Because the redemption fee is included in the assets of a fund on the second trading day, and the remaining scale of a fund may be small, it eventually leads to an unconventional one-day sharp increase in the net value of a fund unit.