Investopedia defines a Collateralized Debt Obligation as: "A structured financial product that pools together cash flow-generating assets and repackages this asset pool into discrete tranches that can be sold to investors." A type of structured Asset-Backed Security (ABS) is used for Collateralized Debt Obligation (CDO). Originally it was for debt markets of corporate level but with the passage of time it evolved into encompassing the mortgage and also Mortgage-Backed Security (MBS) markets. It is a structured financial product or synthetic investment that handles the pooling of cash flow-generating assets together and then afterwards repackages the asset pool into discrete tranches (a tranche is a portion of something, especially money) that are further going to be sold to investors. The term collateralized debt obligation (CDO) is used because the pooled assets such as bonds, loans and mortgages are essentially obligations of debt that serve as CDO collateral. In...