When investors buy funds, they should rationally allocate positions and minimize risks. Investors can make reasonable allocation according to market conditions and fund types. In a bull market, investors can allocate more equity funds and reduce the allocation of some bond funds and monetary funds. For example, in a bull market, investors can buy 60% equity funds, 30% monetary funds and 10% bond funds. In a bear market, we should allocate more bond funds and money funds and reduce some stock funds. For example, 60% of positions are money funds, 30% are bond funds and 10% are stock funds.