Financial derivative securities are the most active type of financial securities in emerging financial markets in the past decade or so. Derivative securities are securities derived from an underlying security (such as a stock), such as options or index futures. Their primary function is to control the risk of loss from investing in underlying securities within the limit that investors are willing to accept, and transfer the remaining risk to the other party in the derivative securities transaction. Options are a type of derivative security and a choice provided to people. For example, if someone wants to buy a stock or bond in the future, if he buys futures, since the price may rise or fall, he may make a lot of money or suffer an infinite loss. But an option is a right, and he can give up this right when the gain outweighs the losses. This not only gives people a choice but also prevents you from suffering heavy losses.