The Full Form of CLO is Collateralized loan obligations.

A collateralized loan obligation (CLO) is a single security backed by a pool of debt. The process of pooling assets into a marketable security is called securitization. Collateralized loan obligations (CLO) are often backed by corporate loans with low credit ratings or loans taken out by private equity firms to conduct leveraged buyouts. A collateralized loan obligation is similar to a collateralized mortgage obligation (CMO), except that the underlying debt is of a different type and character—a company loan instead of a mortgage.

With a CLO, the investor receives scheduled debt payments from the underlying loans, assuming most of the risk in the event that borrowers default. In exchange for taking on the default risk, the investor is offered greater diversity and the potential for higher-than-average returns. A default is when a borrower fails to make payments on a loan or mortgage for an extended period of time.