The subject matter of spot trading and spot deferred trading is in kind, and there is no limit to the delivery time. Traders can deliver goods at any time according to their own declaration, and the price of physical transaction is the current price.
Silver futures refer to futures contracts with the silver price as the target in a certain period in the future. Silver futures contract is a standardized futures contract, which is formulated by the corresponding futures exchange and has detailed silver specifications, silver quality and delivery date.
Spot silver is a contract sale based on the principle of capital leverage. It is not what we usually call cash on delivery, but the delivery formalities are required to be completed within 1-2 working days after the transaction. However, some investors do not actually deliver silver after the transaction, but just close their positions after the expiration to earn the difference profit.