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Find this formula: total profit and loss = lots × profit points × point value-overnight interest.
This is the calculation method of profit and loss of index futures. The number of lots refers to how many lots (warehouses) you bought, the profit and loss points refer to the price difference between your buying and selling points, and the point value refers to how much money a point represents. For example, the current provision of CICC is 300 yuan. If you hold a position overnight, you should also subtract the interest you should earn that night.