After the fund loses 20%, it is not a serious loss, but a moderate loss. At this time, the amount of jiacang does not need to be too large. Generally speaking, a large number of positions need to wait until there is a deep loss and the probability of a market turning point is high.

Therefore, investors need to pay attention to whether the market value of the fund will continue to fall after a loss of 20%, and if it is still sustainable, add a small number of positions. If the continuity is reduced, you can gradually add positions.