At present, we can't make a profit by buying and selling the Shanghai Composite Index through normal channels, but we can only make a profit by buying and selling index futures with the Shanghai Composite Index as the subject matter in the future. Take Hong Kong Hang Seng Index Futures as an example: If you buy a contract at 3,000 points, if it rises to 4,000 points, you can earn 4,000-3,000-10 = 990 points, and your profit is 49,500 yuan, calculated by 50 yuan dollars per point. However, futures can be traded in both directions. If you sell a contract at 3000, but it actually drops to 2000, you can make a profit of 49500 yuan. If it goes up, you will lose. In short, you can either buy futures or sell short. Whether they go up or down, they have a chance to make a profit. The key is your accurate judgment and decisive trading. Of course, the setting of Shanghai Stock Exchange index futures in the future will definitely be different from that of Hong Kong stocks, and it may not be 50 yuan every time.