1. The initial total position of your account is 45,000+5,000 = 50,000 yuan. When 10% falls, the total position =50000-50000* 10%=45000, and the margin = 45000 * 65438+.

2. Because you saved 50,000 yuan and bought a white sugar futures with a transaction amount of 50,000 yuan and a margin of 5,000 yuan, it is equivalent to buying a white sugar future positions with 100% funds. When the price drops 100%, the actual value of this sugar futures drops from 50,000 yuan to 0 yuan, which means that sugar is worthless (of course, you deposit it).

It can be seen that no matter how much the price falls, no additional funds are needed to buy the open futures contract, and the maximum loss of buying the open futures contract is 100%.