China Financial Futures Exchange is a legal person exchange established with the consent of the State Council and the approval of China Securities Regulatory Commission, which specializes in the trading and settlement of financial derivatives such as financial futures and options. Investors can make suggestions through letters and visits.

Option is the right to buy or sell a certain number of specific items at a specific price at a specific time in the future. Therefore, option trading is a kind of right trading, and stock index option is an option contract with stock index as the exercise variety.