资产抵押债券（ABS，Asset-backed security），是以资产(通常是房地产)的组合作为抵押担保而发行的债券。

全称Asset-backed security，也叫资产担保证券或资产支撑证券，由银行、信用卡公司或者其他信用提供者的贷款协议或者应收帐款作为担保基础发行的债券或票据。在ABS中可以分为狭义ABS和CDO两类，前者包括信用卡贷款、学生贷款、汽车贷款、设备租赁、消费贷款、房屋资产抵押贷款等为标的资产的证券化产品，后者是近年内迅速发展的以银行贷款为标的资产的证券化产品。

An asset-backed security (ABS) is a security whose income payments and hence value are derived from and collateralized (or "backed") by a specified pool of underlying assets. The pool of assets is typically a group of small and illiquid assets which are unable to be sold individually. Pooling the assets into financial instruments allows them to be sold to general investors, a process called securitization, and allows the risk of investing in the underlying assets to be diversified because each security will represent a fraction of the total value of the diverse pool of underlying assets. The pools of underlying assets can include common payments from credit cards, auto loans, and mortgage loans, to esoteric cash flows from aircraft leases, royalty payments and movie revenues.