Short selling means actual reverse short selling. There are two main ways to short the stock market. One is short selling, which needs to be completed by opening the function of margin financing and securities lending. Now only more than 900 stocks can be short-sold. The other is stock index futures, which directly short positions through short positions.
Short selling refers to selling stocks at the current price in the expectation of future market decline, and buying them after the market decline to obtain the difference profit. Its trading behavior is characterized by selling first and then buying. In fact, it is a bit like the credit transaction model in business. This model can profit in the wave band of falling prices, that is, borrowing goods at a high level and selling them, and then buying and returning them after falling.
Shorting RMB through put options is also based on the above principle. It is artificial speculation to sing down the RMB option market, sell at a high level and buy at a low level.