According to the data revealed by Desheng Fund Research, during the whole trading month of March, Shanghai A shares dropped by 862 points, down 19.89%, creating the largest single-month fall in history; and the across-the-board fall in individual share prices has become the norm for this month's market. The majority of fund investors are stuck in a situation where their securities are worth less than the buying price. Clearly, when the nest is upset, how can there be eggs that remain intact?! This is where the investment risk lies, that is, under extreme market conditions, all investments will suffer losses, the only difference being the size of the loss. Therefore, establishing the right investment concept and awareness, and doing a good job in risk prevention is an important part of investment.