Also know as Standard & Poor’s Ratings Services Credit Ratings on Xpressfeed via Wharton Research Data Services (WRDS)). 9,000 global issuers including corporates, financial institutions and insurance companies; 600 sovereign, international public finance and government entities; 11,000 structured finance transactions including asset-backed, commercial mortgage-backed and residential mortgage-backed securities and collateralized debt obligations. Historical data for global issuers and structured finance data is available back to 1922; public finance data is available back to 2007. Available through WRDS. Requires user to validate through password (undergraduates request a research assistant account and list your adviser as your faculty member).