There are three contracts for spot crude oil: 100 barrels, 300 barrels and 500 barrels, and the margin ratio is 5%, 5% and 3% respectively;

The lever is enlarged to 20 times, 20 times and 33 times respectively;

Take the price of 65438+3000 yuan for 00 barrels as an example. The down payment is 1500 yuan, 4500 yuan and 4500 yuan respectively.