a deposit means to pay a small amount of money as an intention deposit or a deposit. There is a concept of margin in futures or spot in domestic investment market. For example, the gold and silver t+d of Shanghai Gold Exchange can participate in trading only by freezing part of the margin. After the transaction is completed, the deposit is thawed, which is equivalent to investing with a small amount of money, forming a lever and making the investment more flexible. Then there must be a position in the process of trading, and the margin occupied when holding a position is the position margin.

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