This document is a guide that provides an overview of structured credit, focusing on collateralized loan obligations (CLOs). It explains the growth of the structured credit marketplace, which has reached approximately $3 trillion, and discusses the characteristics of structured credit investments. The guide outlines how securitization works, detailing the process of bundling fixed-income assets such as loans and mortgages into structured credit investment vehicles. It emphasizes the importance of understanding the securitization process to make informed investment decisions. The document describes the structure of CLOs, including the various tranches that represent different levels of risk and return. It explains how ratings agencies evaluate these tranches and the implications of their payment priority structure. The guide also addresses the risks associated with investing in CLOs, including the potential for loss of principal and liquidity risks. Overall, it serves as a resource for investment professionals seeking to navigate the complexities of structured credit.