The stock index, that is, the Shanghai and Shenzhen 300 Index, takes out the price trend of the most representative 300 stocks from the Shanghai and Shenzhen stock markets as the subject matter. Stocks can only go up, that is, if you buy stocks, you can make money if you go up. But futures can be short. Sell when the price is high, buy when the price is low, and earn the difference.

Like the stock index, you sold it in 2459 and bought it in 2449, earning a price difference of 10. One 300 yuan of the stock index is the price difference of 3,000. This situation in the domestic stock market is very suitable for shorting.