抵押贷款支持证券（MBS）是最早的资产证券化品种。最早产生于60年代美国。它主要由美国住房专业银行及储蓄机构利用其贷出的住房抵押贷款，发行的一种资产证券化商品。MBS：Mortgage-Backed Security， 抵押支持债券或者抵押贷款证券化。In finance， a mortgage-backed security (MBS) is an asset-backed security whose cash flows are backed by the principal and interest payments of a set of mortgage loans. Payments are typically made monthly over the lifetime of the underlying loans.