Because stock index futures are traded on margin, the price of one lot of stock index futures is related to the stock index futures point, price per point and margin ratio. Assume that an index futures quote is 2,000 points, each point is insured at 150 yuan, and a margin of 15% is paid. Then, the cost of one lot of stock index futures is: 2,000*150*15%=45,000 yuan.