Although they are all financial investments, the trading patterns are quite different. Crude oil is a two-way transaction, which can buy up and down, while stocks are a one-way transaction, which can only buy up and not buy down.

Moreover, the trading mechanism of "buy up and buy down" is internationally recognized. It has been tested for hundreds of years and is successful, which is conducive to stabilizing the capital market and avoiding unilateral ups and downs. For example, the securities lending business in China is actually to allow stocks to be short, that is, to learn from the trading rules of the spot market to improve the trading rules of the China stock market. Secondly, buying up and buying down is actually buying direction and grasping the overall trend in the future. If you know whether the price of a product will go up or down in the future, then you must make money. There is a saying in the stock market that a bull market makes money by buying up, and a bear market makes money by not doing stocks. This is the same reason. Investment pays attention to vision and tests the individual's ability to predict the future.