Moody's Corporation - Moody's Investors Service

Moody's Investors Service

Moody's Investors Service is the bond credit rating business of Moody's Corporation, representing the company's traditional line of business and its historical name. Moody's Investors Service rates debt securities in several market segments related to public and commercial securities in the bond market. These include government, municipal and corporate bonds; managed investments such as money market funds, fixed-income funds and hedge funds; financial institutions including banks and non-bank finance companies; and asset classes in structured finance.

Moody's Investors Service's closest competitors are Standard & Poor's (S&P) and Fitch Group. Together, they are sometimes referred to as the Big Three credit rating agencies. Moody's Investors Service and its close competitors play a key role in global capital markets as a supplementary credit analysis provider for banks and other financial institutions in assessing the credit risk of particular securities.

According to Moody's, the purpose of its ratings is to "provide investors with a simple system of gradation by which future relative creditworthiness of securities may be gauged". To each of its ratings from Aa through Caa, Moody's appends numerical modifiers 1, 2 and 3; the lower the number, the higher-end the rating. Aaa, Ca and C are not modified this way.