The calculation formula is as follows:
Closing profit and loss on the same day = (closing price-opening price) × closing amount
Deferred liquidation surplus = (liquidation price-settlement price of the previous day) × liquidation amount
When selling and closing positions, the positive number in the above formula is profit and the negative number is loss; The opposite is true when buying a peace warehouse. When calculating the investment income, the above liquidation gains and losses shall be deducted from the trading commission.