Because of the particularity of gold, its financial attribute is far greater than the commodity attribute, so both the derivative transaction of gold and the pricing transaction in the spot market will involve the issue of gold trading margin. For example, the present value of a kilogram of gold is about 440,000 yuan, and the margin of Shanghai Gold Exchange and Shanghai Futures Exchange is 10%, which means that the price of a kilogram of gold can be locked in the exchange with 44,000 yuan. .