1, Fairness: The settlement price can reflect the price changes in the futures market more fairly and avoid abnormal price fluctuations caused by market manipulation.

2. Stability: The settlement price is a weighted average price, which can better reflect the trading situation of the whole day compared with the closing price, and can reduce the influence of price fluctuation and make the price more stable.

3. Risk control: Using the settlement price to calculate the fluctuation can better control the market risk and avoid market instability and market risk caused by large price fluctuations.