If the fund is fixed, it can be held for a long time at any time. If it is not fixed, it is not recommended to hold it for a long time at any time. This way, the probability of loss is relatively high. Investors are advised to buy the fund at a low level and hold it for a long time, which is more likely to gain income.

there is no need to choose timing for the fixed investment of the fund because the fixed investment shares the cost equally by buying in batches, thus reducing the risk, but it is better for the fixed investment of the fund to be carried out in the process of falling.