The document discusses the "magic formula" approach to investing and its application to U.S. for-profit education stocks. It summarizes the magic formula methodology and reviews why it has worked historically. However, it notes that while for-profit education stocks score highly using the magic formula, they are easy to dismiss due to significant regulatory risks facing the industry. The document also reviews other past magic formula stock picks that would have been easy to dismiss but performed well. It concludes that U.S. for-profit education stocks may appear cheap but could represent "value traps" due to structural issues in the industry.