This program uses the Yahoo! Finance website to download and sort historical stock data for a user-specified time period. The user can either supply the program with individual ticker symbols or with a text file containing a list of ticker symbols. The program returns a structure array that holds information on the date, opening price, closing price, high, low, volume, and adjusted closing price. The user must specify the date range for the desired information, and has the option of specifying a sample frequency of daily, weekly, or monthly. Refer to the help section in the m-file for data formats and options.