These are 3 Mental Models principles distilled from John Templeton's writing and public remarks. Use them as a decision checkpoint: translate each rule into a yes/no test, write what evidence would change your mind, and set a review date before you act. When a rule feels vague, open the full principle page and capture the driver you can verify (cash flows, leverage, incentives, competitive edge). This is educational, not investment advice—double-check primary sources and fit every rule to your time horizon, risk budget, and constraints.
"To buy when others are despondently selling and to sell when others are avidly buying requires the greatest fortitude and pays the greatest reward."
Buy when others sell in despair, sell when others buy greedily.
Read Full Analysis →"An investor who has all the answers doesn't even understand the questions. Humility is the foundation of good judgment in markets."
Humility prevents overconfidence in investing.
Read Full Analysis →"A thankful heart leads to greater prosperity. Begin each day with gratitude and prayer, and your judgment will be clearer."
Gratitude and humility improve investment judgment.
Read Full Analysis →Use this page as a workflow, not a collection of quotes. Pick 3–5 principles, translate each into a concrete check, and review your decisions on a fixed cadence. These are educational guardrails—always verify facts and match them to your own constraints.
Rehearse a scenario decision → ·Run a weekly toolkit → ·Browse all principles →
Templeton pioneered global diversification, investing in international markets when most American investors focused solely on domestic stocks. His investment philosophy centered on finding "maximum pessimism" – buying when others were most fearful.
John Templeton has 3 key principles on mental models. The most important one is "Contrarian Investing Model" — To buy when others are despondently selling and to sell when others are avidly buying requires the greatest fortitude and pays the greatest reward.
John Templeton applies mental models through several key principles including "Contrarian Investing Model" and "Humility in Investing". These principles guide practical investment decisions and have been tested across decades of market cycles.
John Templeton's approach to mental models is distinguished by a focus on long-term thinking and fundamental analysis. With 3 specific principles in this area, John Templeton provides a comprehensive framework that investors at any level can study and apply to improve their decision-making.
Treat each principle as a hypothesis. Write the evidence you would need, collect it from primary sources when possible (filings, letters, transcripts), and note what would invalidate the conclusion. If you can’t define inputs and triggers, you’re not applying the rule—you’re quoting it.
Pick a cadence you can sustain (weekly or monthly) and review process signals first: whether you followed your checklist, respected your boundaries, and documented assumptions. Only then look at outcomes. The goal is fewer low-quality decisions, not perfect prediction.
