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How to calculate the closing price of options?
The calculation method of closing price is the final transaction price of the contract on that day. If there is no transaction on that day, the closing price of the previous trading day is the closing price of that day. If there is no transaction on the first day of listing, the opening price announced by Shanghai Stock Exchange shall be the closing price of the day.

When trading options, we only need to pay attention to the opening price, the latest price and the closing price, as well as the highest and lowest prices of the day. The settlement price is mainly used for end-of-day asset settlement and trial calculation of opening margin.