Stock index futures are speculation in the Shanghai and Shenzhen 300 Index, and the exchange stipulates that the Shanghai and Shenzhen 300 Index will have a 300 yuan. If the Shanghai and Shenzhen 300 Index is now 2600 points, it will cost 300 * 2600 = 780,000 to buy 1 stock index futures, and futures are margin trading. If the exchange stipulates that the margin is 15%, then investors should buy 1 stock index futures. This is margin trading, that is, customers can buy and sell full-value contracts with a certain proportion of funds. Jinyuan futures, thoughtful service, reasonable handling fee.