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. Please allow up to 48 hours for the registration and approval process. Faculty may request a class account for a course.