The second is "under-buying and over-selling"

The third "buy undervaluation index and quality index"

The formula of fixed investment of the fund: the first one is "take profit without stop loss". When we operate, there must be ups and downs. Under the relatively optimistic situation of our current fund market, when the income reaches the profit-taking line set by us in the early stage, we need to redeem it in time, perhaps layer by layer, mainly to let our funds withdraw, so that we don't have to take greater risks in the later callback. For the stop-loss line, when we find that the fund is currently losing money, we need to analyze the current situation at this time. At this time, if we blindly redeem it, our previous fixed investment operation will be worthless.

Second, the valuation can be used to determine the redemption time. Generally, you can choose a fixed investment when the valuation is low, but you need to redeem the fund in time when the valuation is high. This requires us to grasp the valuation of the fund as a whole, have an overall grasp of the operation of the fund, and don't rush to buy or sell.

The third "buy low valuation index and high quality index" is that when choosing a fund, you need to choose a good fund, and you can also consider higher quality stocks such as consumption and medical care.