Warren Buffett on Mr. Market

Buffett wrote that the financial crisis had created the rare conditions in which the prices of high-quality businesses' debt and preferred equity offered returns that would have been unthinkable a year earlier. He argued that the investor's task in a panic is to have both the capital and the temperament to act when others are forced to sell, and that the chief obstacle is rarely the absence of opportunity but the absence of liquidity and nerve when opportunity appears.

On deploying capital during the 2008 panic.

Buffett wrote that Berkshire would continue to invest only in businesses it understood, even if that meant underperforming a market inflating speculative valuations in businesses it did not understand. He argued that the test was not whether Berkshire had participated in whatever was rising fastest, but whether the businesses it owned continued to meet the standard of durable competitive advantage and reasonable price. He framed the bubble as a test of temperament rather than intellect.

On refusing to chase the dot-com boom.

Buffett wrote that Berkshire's policy was to hold a small set of businesses it understood and admired, and that the test for inclusion was not whether a position had risen in price but whether the underlying business still met the original standard. He compared the portfolio to a group of permanent holdings — the kind of business one would be content to own if the stock market closed for a decade — and warned that the temptation to trade in and out of such businesses was the chief way owners harm themselves.

On the 'permanent holdings' framing and the futility of trading wonderful businesses.

Buffett argued that the efficient-market hypothesis could not account for a cohort of investors who, sharing a common intellectual origin in Ben Graham's teachings, had independently produced long-term records of outperformance. He used a coin-flip analogy: if a national coin-flipping contest produced a handful of winners after many rounds, one would ask whether the winners shared a common method, not whether they had each been lucky.

On the common method shared by the value-investing cohort.

Buffett emphasized that the investors he cited were not making the same investments; they owned different businesses, in different industries, with different concentrations. What they shared was a disposition: the willingness to act only when price offered a genuine margin of safety relative to value, and the temperament to do nothing when no such opportunity existed. He argued that temperament, rather than intellect, was the differentiating factor the hypothesis could not model.

On temperament as the true common factor.