Leverage, adding borrowed money to existing funds for investment is capital amplification, for example, 1 block amplification 10 times is 10 times faster. Short selling is a common operation mode in stock futures market. The operation is to expect the stock futures market to have a downward trend. The operator will sell the chips in his hand at the market price, and then buy them after the stock futures fall to earn the intermediate price difference. Hedging means that one investment deliberately reduces the risk of another investment. This is a way to reduce business risks while still making profits from investment. General hedging is to conduct two transactions at the same time, both related to the market, in the opposite direction, with the same amount and breakeven.