Stock index futures only look at the index of the contract expiration date, which has nothing to do with the current index. In the last example, you bought it with 1 100 points, which means the cost of 1 100 points. Whether the stock index is 1000 or 1200 now has no effect on your profit and loss.

Futures are margin trading, and the margin of stock index futures contracts may be around 10%. In this case, not all Man Cang, must leave a certain excess margin. Generally speaking, it is better to keep the position ratio below 50%. For beginners, it is safer to control it within 20%, so that there is no debt in the daily settlement. If it's Man Cang, it's very risky. Secondly, it's annoying to add a margin for a slight loss.

In other words, it is right for you to promise to buy this market index at the price of 1 100 at the end of February. The so-called futures refer to the commodities that will actually be traded in the future. "Firm offer" is called delivery, and the goods here are called the target. Specifically, index futures are indexes. So if you go long now, it means that you will buy at the current price in the future. If you go short now, it means that you will sell at the current price in the future.

Of course, if you don't want to participate in the delivery, you can make the opposite transaction at some point in the future, which is called liquidation. After the liquidation, you will no longer participate in the delivery. This is the reason for buying and selling.