Futures opening margin ensures that you have enough funds to trade, so that you can bear the loss. Because futures is a two-way transaction, if there are only two traders in the market, you and the other party, then you can't close your position if the other party doesn't close it. The market shows that this is a stop loss, because only one party wants to close the position (that is, open the position) and the other party does not have enough willingness to trade. In this way, your deposit balance will be deducted continuously. When the deduction is 0, if your transaction is not over, then start to deduct the deposit you paid when you opened the position. (This is the so-called short position. If your deposit is also deducted, you need to make up the money to enter the market. This time is called an empty warehouse. Because your opponent is profitable, others must make a profit when they make a profit, and that income comes from your money. So you have to make amends.

In order to guard against financial risks in China, there are several levels of deposits. The first is the deposit of the exchange. For example, the margin of the commodity exchange is 3%, and then the second is the margin of the futures company. At this time, the margin of this commodity may increase to 10%, which is increased by the futures company. When you lose money and start to deduct your margin, the futures company has the right to terminate your trading without your consent. If your margin loss is so serious that the futures company cannot close its position, the exchange will forcibly terminate your transaction without your consent. If the exchange doesn't implement it, you must add a margin. If you run, you can't run, because if you run, the futures company will have to take money to fill your deficit.

It seems that this kind of thing rarely happens at ordinary times, but there will always be goods with pricing power outside the market during holidays (so the margin requirements of our futures will generally be greatly increased before holidays), but 100% is not safe. If you short copper during the annual leave, and during this period, the price of copper in the external market skyrockets for some reason, then if the copper line rises or falls after the holiday and your margin balance is insufficient, you will have such a risk, because the market will always be multi-faceted. In the end, it can only make up for the loss.