Let me give you an example. For example, children like to play with slingshots, so a slingshot manufacturer called Xiaohei began to make slingshots. Soon, the slingshot market was fiercer than everyone expected. Suddenly one day, Xiaohei was wandering on the road, saw two children quarreling and asked them why. A child said, "I think slingshots are expensive now, and they will be cheap in three months."

Another child said, "I think the price of slingshots is low now, but it will be expensive in three months."

The two children are arguing. Asked Xiaohe, Xiaohe couldn't solve it.

The two children laughed: "I thought you knew how much!" " "

Blackie patted everyone on the head and thought of a clever plan to make money. He found that two children were not playing with slingshots. They just sit on the side of the road and discuss whether the price of slingshots will go up or down. So he found his grandfather and asked him to lend him a house. Xiaohei wants to hold a gambling game and invite children from the roadside to bet on the ups and downs in the gambling game. And this gamble is called "futures".

This is the general nature of futures, because most of us speculate in futures not for delivery but for arbitrage.