Commercial Paper: It is an unsecured obligation issued by the corporation or bank to finance its short-term credit requirements, like accounts inventory and receivable. Maturities usually range from 2 to 270 days. The commercial paper is accessible in a broad range of denominations, can be either interest-bearing or discounted, and generally contain a limited or non-existent secondary market. Commercial paper is generally issued by the companies with very high credit ratings, meaning that the investment is approximately always at relatively low risk.