According to the nature of the underlying assets, financial options can be divided into spot options and futures options. Spot option refers to the option with various financial instruments and other basic assets as the subject matter of the option contract, such as various stock options, stock index options, foreign exchange options, bond options and so on. Futures options refer to options with various financial futures contracts as the object of options contracts, such as various foreign exchange futures options, interest rate futures options, stock index futures options and so on.