1. The fund theme affects the trend of the fund's net value, that is, when the fund theme falls, it will lead to a decline in the fund's net value, and when the fund theme rises, it will promote the fund's net value to rise. Therefore, when the theme of the fund rebounds, it will promote the net value of the fund to rise.

2. The fund manager changes positions, that is, after the fund is called back, in order to ensure its historical performance, the fund manager will change positions, sell relatively poor stocks and buy relatively strong stocks.

3. When the market is poor, the net value of the fund will be affected by the market and there will be a callback trend. When the market is good, the net value of the fund will be affected by this.

After the fund callback, investors can take the following measures to increase their positions:

1, equal purchase method

Investors can choose to buy the same amount every time in the process of fund net value callback, such as 1000 yuan every time.

2. Equal difference purchase method

In the process of fund net value callback, investors buy the same amount every time. For example, investors buy in three times, and the amount of each purchase is 1000 yuan, 2,000 yuan and 3,000 yuan respectively.