The CRSP US Stock Database contains historical end-of-day and month-end prices on all listed NYSE, Amex, and NASDAQ common stocks along with basic market indices. CRSP's unique permanent identifiers allow for clean and accurate backtesting, time-series and event studies, measurement of performance, accurate benchmarking, and securities analysis. Click here
for detailed features and coverage. The Wharton Research Data Service is a tool that provides web-based access to this database. WRDS is only available to JHU faculty and graduate students who have approved WRDS accounts for their academic research. Faculty may request a class account for a course.