(1) Protect the interests of the brokerage firm. When the customer fails to pay for some reason, the brokerage firm will compensate with the deposit.
(2) In order to control the speculative activities of the exchange. In general, the down payment is about 10% of the total contract price. Margin is essentially a sum of money paid by a trader to a commodity clearing house through a broker, without calculating interest, to ensure that the trader has the ability to pay commissions and possible losses. But trading margin is by no means a margin for buying and selling futures.
2. Occupancy margin: Take 500 barrels of crude oil as an example, the leverage ratio of crude oil margin is 3%, and the spot price of 500 barrels of crude oil is150,000 yuan. Then according to the trading rules, investors need to pay a deposit of 4500 yuan for trading 500 barrels of crude oil, which is the so-called occupation deposit.