Stock Investment Guide (SIG) performs fundamental stock analysis, using the methods used by stock clubs. SIG generates buy, hold, and sell levels for the stock being analyzed. SIG can read and write standard .ssg file formats, create semi-logarithmic graphs of stock data, and perform a complete stock investment guide.

The Stock Investment Guide works with online data sources or with a paid subscription service from AAII. Users can also trade .ssg files with fellow club members, even if other members use Windows. Also includes Portfolio Analysis and Stock Comparison applications integrated with the software.