Swap, also known as "swap", refers to the exchange of different currencies (interest rates) according to the agreed principal amount and interest rate (currency) in a certain period of time in the future. Commonly used are currency swap and interest rate swap.
Futures, commonly known as futures contracts, refer to standardized contracts formulated by futures exchanges, which stipulate to deliver a certain number of subject matter at a specific time and place in the future. This subject matter, also known as the underlying asset, is the spot corresponding to the futures contract, which can be a commodity, such as copper or crude oil, a financial instrument, such as foreign exchange and bonds, or a financial indicator, such as the three-month interbank offered rate or the stock index.
Choice is the right to choose the future. When the future price is favorable to you, you will exercise your rights; When it is unfavorable, you can give up your rights.