Abs differ from most other kinds of bonds in that their creditworthiness ( which is at the triple - a level for more than 90 % of outstanding issues ) derives from sources other than the paying ability of the originator of the underlying assets 资产支持型证券与其它大多数债券的不同之处在于它们的信用价值（发行流通中的90以上信用评级为3a级）并不取决于标的资产初始持有人的偿付能力。
