The stock fell by 20, and the stock lost 20x8000=160000

Because the futures contract is the seller, the profit is 15 points, and the CSI 300 stock index futures contract is 300 yuan per point, so the total of 50 lots Profit 15x300x50=225000

Therefore, without considering the handling fee, the profit is 225000-160000=65000

For reference only!