These are 6 Investment Psychology principles distilled from Warren Buffett'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.
"Should you find yourself in a chronically leaking boat, energy devoted to changing vessels is likely to be more productive than energy devoted to patching leaks."
Recognize sunk costs: abandoning a failing investment beats endlessly repairing it.
Read Full Analysis →"Have the courage to act when opportunity presents itself. Hesitation leads to missed opportunities."
Analysis without action is worthless — act decisively when opportunity appears.
Read Full Analysis →"If you cannot control your emotions, you cannot control your money."
Emotional investing is the fastest path to financial ruin.
Read Full Analysis →"You are neither right nor wrong because the crowd disagrees with you. You are right because your data and reasoning are right."
Being right depends on facts and reasoning, not on whether others agree with you.
Read Full Analysis →"The most important quality for an investor is temperament, not intellect."
Emotional discipline matters more than IQ for investment success.
Read Full Analysis →"What counts for most people in investing is not how much they know, but rather how realistically they define what they don't know."
Honest self-assessment of what you don't know prevents the costliest investment mistakes.
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 →
He is the chairman and CEO of Berkshire Hathaway, a multinational conglomerate holding company. His investment approach combines the value investing principles learned from his mentor Benjamin Graham with insights on business quality from Philip Fisher.
Warren Buffett has 6 key principles on investment psychology. The most important one is "Admit Mistakes" — Should you find yourself in a chronically leaking boat, energy devoted to changing vessels is likely to be more productive than energy devoted to patc...
Warren Buffett applies investment psychology through several key principles including "Admit Mistakes" and "Courage to Act". These principles guide practical investment decisions and have been tested across decades of market cycles.
Warren Buffett's approach to investment psychology is distinguished by a focus on long-term thinking and fundamental analysis. With 6 specific principles in this area, Warren Buffett 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.
