One: In the case of buying one:
1. If it is an index fund, it may gain a large excess return by betting on an index in the rapid rising stage, or it may be held until March, but other indexes will lose the opportunity cost if they rise again.
2. If it is an active fund, it may be that an excellent fund manager has been selected and the performance has exceeded expectations. It may also be that manager changes or style drift lead to a big retreat. From the point of view of reasoning, the result of buying one is either one or the other, or the excess income, or the inability to rise or retreat.
Two: In the case of buying more:
1, Buy More only means that you need to pay attention to tracking the dynamics of multiple funds. To tell the truth, it is very painstaking.
2. It seems that many funds are diversifying risks, but they are not. There is a saying that stock investment is moderately concentrated. Why do you say that? It is unrealistic to get excessive returns too dispersedly, and it will face great risks that a single fund can't control if it is too concentrated.
When the market is good, funds will generally rise. Investors had better buy one fund instead of multiple funds, because the return of buying one fund may be higher than that of buying multiple funds, and when the market is bad, investors had better buy multiple funds, which can spread risks.
It should be noted that when investors buy multiple funds, they should try their best to choose funds that are not very relevant, and at the same time rationally allocate the proportion between them.
For example, when investors are in a bull market, the fund portfolio can increase the proportion of equity funds and appropriately reduce the proportion of bond funds and monetary funds; In the bear market, investors can appropriately increase bond funds and monetary funds in the fund portfolio and reduce the allocation of stock funds, which can not only spread the risks of investors, but also ensure their returns.