An option is an option for the buyer to buy or sell a certain number of basic commodities at the allowed time in the future after paying a certain option fee.

1. option pricing is one of the most complicated mathematical problems in all financial application fields.

2. From 65438 to 0979, Cox, Ross and Rubinstein put forward a binomial model.

3. CAPM (CAPITALASSETTPRINGMODEL) was put forward by American scholars WilliamSharpe, Lintel, Trino and JanMossin. And others 1964 developed on the basis of modern portfolio theory and capital market theory. They mainly study the relationship between the expected rate of return of assets and risky assets in the securities market and how the equilibrium price is formed. They are the pillars of modern financial market price theory and are widely used in investment decision-making.