Warren Buffett
Warren Buffett's framework turns an investing idea into a decision memo: what to check, what to avoid, and what would change your mind. Use the 77 principles below as a checklist—not as buy/sell signals—and verify any numbers or quotes with primary sources. If you're new, start with Value Investing to frame business quality, valuation discipline, and risk, then browse topics to find the rules that match your situation. Pair each principle with a concrete trigger so you can review whether you followed the process after the decision.
- Start with the principles as questions (not trade signals).
- Write down your thesis, risks, and “what would change my mind”.
- Cross-check with scenarios, filings, and your own data sources.
Educational only. This is not investment advice.
"Be fearful when others are greedy and greedy when others are fearful."
About Warren Buffett
Warren Edward Buffett (born August 30, 1930) is an American businessman, investor, and philanthropist. He is the chairman and CEO of Berkshire Hathaway, a multinational conglomerate holding company. Known as the "Oracle of Omaha," Buffett is one of the most successful investors of all time with a net worth exceeding $100 billion. Under his leadership, Berkshire Hathaway's stock price has grown from $19 in 1965 to over $500,000 per share, representing an annualized return of approximately 20%. His investment approach combines the value investing principles learned from his mentor Benjamin Graham with insights on business quality from Philip Fisher. Buffett focuses on companies with durable competitive advantages ("economic moats"), strong management teams, and predictable earnings, holding them for the long term. Buffett is also known for his annual letters to shareholders, which have become essential reading for investors worldwide, offering wisdom on business, investing, and life.
Core Investment Principles
When to Sell
When the facts change, I change my mind. What do you do, sir?
→Admit Mistakes
Should you find yourself in a chronically leaking boat, energy devoted to changing vessels is likely to be more producti...
→Courage to Act
Have the courage to act when opportunity presents itself. Hesitation leads to missed opportunities.
→Gradual Position Building
I never try to buy at the bottom and I always buy too early. But that doesn't matter because I have long-term goals.
→Dollar Cost Averaging
If you like spending six to eight hours per week working on investments, do it. If you don't, then dollar-cost average i...
→Browse Warren Buffett's Principles by Topic
Famous Quotes
"Rule No. 1: Never lose money. Rule No. 2: Never forget Rule No. 1."
"Price is what you pay. Value is what you get."
"It's far better to buy a wonderful company at a fair price than a fair company at a wonderful price."
"Our favorite holding period is forever."
"The stock market is a device for transferring money from the impatient to the patient."
