Moody's Corporation, often referred to as Moody's, is the holding company for Moody's Investors Service (MIS), a credit rating agency, and Moody's Analytics (MA), a provider of financial analysis software and services.

Moody's Investors Service, often referred to as Moody's, 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 provides international financial research on bonds issued by commercial and government entities and, with Standard & Poor's and Fitch Group, is considered one of the Big Three credit rating agencies.