Spot spot means continuous spot, that is to say, the contract can be kept unchanged. Like stocks, they are usually delivered every day.

Spot extension and futures are one type. There is a contract with a fixed delivery time. I can't keep my appointment and need to change my post.

In terms of margin, the spot is 20%, and the futures is less than 20%, which is 20%. This figure is stipulated by the state, and it is illegal to limit the spot below 20%.

Contracts and delivery warehouses are set by each exchange, and some large spot exchanges, such as delivery warehouses and futures of Bohai Commodity Exchange, are one place.

Generally speaking, less money enters the spot and more money enters the futures.