Transaction Immutability

Transaction immutability is the property of a blockchain where once a transaction is recorded, it cannot be altered, deleted, or reversed. This is achieved through the consensus mechanism and the cryptographic chaining of blocks.

In financial derivatives, this provides a finality that is often superior to traditional clearing houses, which may take days to settle trades. Immutability ensures that once a trade is executed and settled on-chain, the ownership of the underlying asset is definitively transferred.

This eliminates counterparty risk related to settlement failure. However, it also means that errors or malicious actions are permanent, placing a high premium on smart contract auditing and user caution.