Securitization is a structured finance process, which involves pooling and repackaging of cash-flow producing financial assets into securities that are then sold to investors. The name "securitization" is derived from the fact that the form of financial instruments used to obtain funds from the investors are securities.
All assets can be securitized so long as they are associated with cash flow. Hence, the securities, which are the outcome of securitization processes, are termed asset-backed securities (ABS). From this perspective, securitization could also be defined as a financial processes leading to an emission of ABS.
Securitization often utilizes a special purpose vehicle (SPV), alternatively known as a special purpose entity (SPE) or special purpose company (SPC), in order to reduce the risk of bankruptcy and thereby obtain lower interest rates from potential lenders. A credit derivative is also generally used to change the credit quality of the underlying portfolio so that it will be acceptable to the final investors.
Securitization has evolved from tentative beginnings in the late 1970s to a vital funding source with an estimated total aggregate outstanding of $8.06 trillion (as of the end of 2005, by the Bond Market Association) and new issuance of $3.07 trillion in 2005 in the U.S. markets alone.
Source: Wikipedia