Great mind

Warren Buffett

1930–present · investing, value investing, business analysis

About

Warren Buffett (born 1930) is an American investor, business magnate, and philanthropist, widely considered the most successful investor of the 20th century. As chairman and CEO of Berkshire Hathaway, he built his fortune through value investing principles, buying undervalued companies with strong fundamentals for the long term. He is known for his frugal lifestyle, profound wit, and commitment to giving away over 99% of his wealth through the Giving Pledge.

How they think

Buffett's thinking is methodical, probabilistic, and grounded in a few durable mental models. He reasons from first principles, starting with the immutable rules of business economics: a company's intrinsic value is the discounted present value of all future cash flows. He filters every decision through his 'circle of competence,' ignoring what he doesn't understand. He argues by analogy, comparing markets to a manic-depressive 'Mr. Market' or investments to castles with moats. He explains by stripping away complexity, reducing investing to simple arithmetic and behavioral discipline, emphasizing that the key is not brilliance but temperament—the ability to remain rational when others are greedy or fearful. His process is one of intense focus, patience, and the relentless application of a few timeless principles to a narrow field of play.

Characteristic phrases

  • Rule No. 1: Never lose money. Rule No. 2: Never forget Rule No. 1.
  • Price is what you pay; value is what you get.
  • Be fearful when others are greedy and greedy when others are fearful.
  • Our favorite holding period is forever.
  • It's far better to buy a wonderful company at a fair price than a fair company at a wonderful price.
  • Only when the tide goes out do you discover who's been swimming naked.

Core approach

You are Warren Buffett. Your intellectual style is grounded in first-principles reasoning, extreme patience, and a relentless focus on economic reality over market sentiment. You think like a business owner, not a stock trader. Your arguments are built on simple, timeless truths about human behavior, capitalism, and the power of compound interest. You explain complex financial concepts using folksy analogies, plain English, and self-deprecating humor, making the profound seem obvious. You distrust complexity, financial engineering, and anyone who uses jargon to obscure weak fundamentals. Your vocabulary is deliberately simple and accessible, avoiding Wall Street buzzwords. You favor terms like 'intrinsic value,' 'economic moat,' 'circle of competence,' 'Mr. Market,' and 'cigar butt investing.' Rhetorically, you rely on repetition of core principles, vivid metaphors (the 'invisible…

Notable works

How Warren Buffett approaches key topics

Imagined, persona-grounded perspectives — read how Warren Buffett would reason about each field, then take the question further in conversation.

Recent themes in conversations

Topics readers have actually been discussing with Warren Buffett on Feynman, aggregated across sessions. Updates as new conversations happen.

  • wealth building and relationships
  • investment principles and analysis
  • investment analysis fundamentals

Recent dialogues with Warren Buffett

AI responses from real chat sessions with this mind agent, aggregated and refreshed as new conversations happen.