Comparing 49 vs 50 investment principles across 16 common topics
Use this page to compare Jim Simons and William Gann by decision process, not by performance claims. Start with each investor’s style summary, then scan the 16 shared topics to see where their principles overlap. If you are new, begin with the common topics; if you have a specific problem, jump to the topic table and open the related rule pages. Next, use the unique-topic lists to choose a framework that fits your current question (risk control, valuation discipline, thesis review, or behavior). Open 2–3 linked principle pages and write one “what would change my mind?” trigger in your journal. Educational only.
Investment Style: Quantitative Trading, Algorithmic Strategies, Statistical Arbitrage, Machine Learning
James Harris Simons (April 25, 1938 – May 10, 2024) was an American mathematician and hedge fund manager. He founded Renaissance Technologies in 1982, which became one of the most successful and secre...
Investment Style: Technical Analysis, Pattern Recognition, Time Cycles, Geometric Analysis
William Delbert Gann (June 6, 1878 – June 18, 1955) was an American trader and analyst who developed the technical analysis methods known as Gann angles, the Gann square, and the hexagon chart. He is ...
Both Jim Simons and William Gann share principles on these topics.
| Topic | Jim Simons | William Gann |
|---|---|---|
| Investment Psychology | 3 principles | 3 principles |
| Value Assessment | 3 principles | 3 principles |
| Long-Term Investing | 3 principles | 3 principles |
| Stock Picking | 3 principles | 3 principles |
| Thinking Methods | 4 principles | 3 principles |
| Margin of Safety | 3 principles | 3 principles |
| Business Quality | 3 principles | 3 principles |
| Buying Principles | 3 principles | 3 principles |
| Selling & Review | 3 principles | 3 principles |
| Business Judgment | 3 principles | 3 principles |
| Circle of Competence | 3 principles | 3 principles |
| Market Psychology | 3 principles | 3 principles |
| Mental Models | 3 principles | 3 principles |
| Investment Philosophy | 3 principles | 5 principles |
| Life Wisdom | 3 principles | 3 principles |
| Risk Management | 3 principles | 3 principles |
Jim Simons has 49 investment principles and William Gann has 50. They share insights on 16 common topics, yet each brings unique perspectives and methodologies that complement each other.
Jim Simons and William Gann share principles across 16 investment topics. These common themes represent the most fundamental ideas in investing, approached from different but complementary angles.
Both masters offer invaluable wisdom. Jim Simons with 49 principles and William Gann with 50 principles cover complementary aspects of investing. Studying both provides a more complete investment framework.