It is a long-term process for the market to realize the bull-bear conversion cycle, and the fund's fixed investment also needs long-term persistence. Especially when the market fluctuates and falls, some investors will stop investing or redeem the fund because of the shrinking net value of the fund. But in fact, this situation is more likely to buy more fund shares at a low level, which is conducive to the overall downward shift of investment costs, thus gaining more benefits when the market rebounds.
The fund's fixed investment should not only be "stupid to buy", but also "smart to sell". The choice of exit time directly determines the size of investment income. However, because it is difficult to accurately judge the high point or even the apex of the market, it is advisable to set a profit-taking line for the fixed investment of the fund to achieve effective exit. For example, the target annualized rate of return is 20% or the cumulative rate of return 100%. When the target is reached, the fixed investment will be stopped, and it will be redeemed in one time or in installments. When the market goes down again, a new round of fixed investment will be started.