An asset-backed security is a type of bond or note that is based on pools of assets, or collateralized by the cash flows from a specified pool of underlying assets. Assets are pooled to make otherwise minor and uneconomical investments worthwhile, while also reducing risk by diversifying the underlying assets. Securitization makes these assets available for investment to a broader set of investors. These asset pools can be made of any type of receivable from the common, like credit card payments, auto loans, and mortgages, or esoteric cash flows such as aircraft leases, royalty payments and movie revenues. Typically, the securitised assets might be highly illiquid and private in nature.