What is the meaning of eligible collateral in credit support annex?

Eligible collateral in a Credit Support Annex (CSA) refers to the types of assets that can be used to secure obligations in a derivatives transaction. These assets must meet specific criteria outlined in the CSA to ensure they are liquid, easily valued, and have low credit risk. Common examples include cash, government bonds, and certain high-quality corporate securities. This collateral helps mitigate counterparty risk by providing a safety net in case of default.