Bangalore (Karnataka) [India], February 24: William J. O'Neil, a distinguished figure in the investment realm, has significantly shaped modern stock trading through his comprehensive research and innovative strategies. His seminal work, "How to Make Money in Stocks," introduces the CAN SLIM methodology--a systematic approach that combines fundamental and technical analysis to identify high-growth stocks. This article delves into five pivotal investing rules advocated by O'Neil, providing an in-depth exploration of each principle, supported by data and contemporary insights.