Quantitative hedging is a combination of the concepts of quantification and hedging. "Quantification" refers to the use of statistical methods and mathematical models to guide investment, and its essence is the quantitative practice of qualitative investment. "Hedging" refers to managing and reducing the risk of the portfolio system in order to cope with the changes in the financial market and obtain relatively stable returns. In practice, hedge funds often use quantitative investment methods, and they are often used alternately, but quantitative funds are not exactly the same as hedge funds.