In the stock market, only buying is called opening a position, but in futures trading, this contradictory concept is allowed, because futures can be sold first and then bought-that is, short positions are established, and the futures market is commonly known as "shorting".
Short selling refers to investors who are short-selling the market outlook, so they borrow securities from dealers, sell them first, then buy securities at a low price after the price of securities falls, and then return them to dealers, thus earning the falling price difference.
At present, there are stock index futures available for trading in the stock market. Secondly, there are gold futures, agricultural products futures and metal futures (nonferrous metals and ferrous metals) in China. But I need to remind you that the risk of futures trading is very huge, and if you are not careful, you will lose everything.