1. Extension of futures contract: A futures contract is a standardized derivative contract that promises to deliver an asset at a specific price on a future date. When the expiration date of the futures contract approaches, both parties want to continue to hold the contract, and they can choose to extend it, that is, extend the expiration date of the contract to a future date.
2. Extension of option contract: option contract gives the holder the right to buy or sell an asset at a specific price on a specific date in the future.
3. Extension of interest rate swap: Interest rate swap is a financial derivative, which is used to exchange cash flows of products with different interest rates, with the purpose of reducing financing costs or risks. In interest rate swap, the extension can occur after the expiration date of the contract to continue the exchange of interest rates.