1, the biggest loss that investors can bear psychologically. When the fund loss reaches the maximum loss position that investors can bear psychologically, they choose to cut the meat and sell it. For example, the biggest loss that investors can bear psychologically is 5%. When the net value of the fund falls by more than or reaches 5%, they will sell it immediately.

2. The trend of fund net value. When the trend of fund net value falls below the lowest position in front, it means that the fund net value falls below the recent support level and will continue to hit a new low, and investors should sell it.

3. The trend of fund investment targets. The trend of fund theme will affect the trend of fund to a certain extent, that is, when the theme of fund rises, the fund will also rise, and vice versa. Therefore, investors choose to sell when the fund theme ends the upward trend and starts the downward trend.