Hedge Fund is a investment tool that uses diversification, dispersion investment to avoid risk and payment. Unlike general stock funds, its largest feature is available, selling empty. And usually cross-domain investments. The hedge fund can take a short means of selling, and the interest can be obtained when the stock is expected. If it is expected that A shares will fall, they will borrow stocks from the market and pay interest. The borrowed stocks will be thrown, and then bought back at a low price after the stock price falls. The general stock fund cannot be sold. Hedge fund operation is relatively high, and the leverage effect on the market is also obvious. It is widely believed that the current oil prices rise, and there is a role in role. I haven't seen economics for a long time, and I am a teacher and my degree.