many of these investments are complex securities called collateralized debt obligations 许多的这些投资被称作是债务抵押债卷的复杂证卷产品。
the structured finance team rates collateralized debt obligations, or " cdos, " which are securities derived from a pool of underlying credit instruments 他们的结构金融队伍主要负责评估债务抵押债券,这是从各种标的信用工具的资产池中衍生出来的证券。