Resource Description

The CRSP® US Stock Database provides a unique research source characterized by its unmatched breadth, depth, and completeness. It includes CRSP's unique permanent identifiers allowing for clean and accurate backtesting, time-series and event studies, measurement of performance, accurate benchmarking, and securities analysis. CRSP's unique and permanent security and company identifiers, PERMNO® and PERMCO®, offer uninterrupted time series analysis by tracking securities across time, regardless of identifier changes to CUSIP, ticker, company name, SIC Code, and exchange.