Generally, it refers to the part where the value of your assets will change with the fluctuation of the stock price. If you buy 1000 shares, your exposure is actually 1000. For stock index futures, your exposure should be calculated according to the price of the futures you buy, not according to the margin. For example, the Shanghai and Shenzhen 300 Index is now 2,000 points, and my exposure is actually 2,000 * 300 yuan, not calculated by margin. The rule here is simply that the client entrusts 65,438+0,000 yuan, and you can use 800 yuan for pure speculation or 800 yuan to buy futures contracts at most.