There are two unfairness in the stock market. First, each stock has a corresponding banker, and the banker's goal is to earn money from retail investors. Second, even if the stock falls, the bookmakers can still protect their capital and even make money, because they have more money and can participate in shorting stock index futures, while small retail investors have less money and cannot enter stock index futures at all. If they can't do it, they can only keep their eyes open.