Be Greedy When Others Are Fearful

Definition

Buffett describes fear and greed as "two super-contagious diseases" that periodically sweep through markets in unpredictable timing and severity. Rather than trying to forecast when either outbreak will start or end, his operating rule is fixed: "we simply attempt to be fearful when others are greedy and to be greedy only when others are fearful." The mechanism behind the slogan is preparation, not prediction — building the capacity (cash, low leverage, dry powder) during calm periods specifically so it exists when panic creates opportunity, since by definition that capacity can't be assembled after the panic has already started.

In the Book

The 1986 letter frames the principle around Berkshire's insurance investment posture during a euphoric market, noting "little fear is visible in Wall Street" while Berkshire finds no equities meeting its tests — an explicit refusal to chase the mood. The 2006 letter extends the same discipline to underwriting risk directly: after a flood of new capital drove super-catastrophe insurance rates down, Berkshire sharply cut its wind exposure rather than compete on price, stating plainly, "our behavior here parallels that which we employ in financial markets." The clearest demonstration comes in the 2009 letter, written amid the financial crisis, where Buffett describes deploying billions into Dow Chemical, Goldman Sachs, General Electric, Swiss Re, and Wrigley in an 18-month window when capital was scarce and terror-priced, closing with the line: "Big opportunities come infrequently. When it's raining gold, reach for a bucket, not a thimble."

Why It Matters

The insight here isn't the well-worn advice to "buy low" — it's that the capacity to act on a panic has to be built during the boring, unrewarding period beforehand, when holding cash or turning down business looks like underperformance. By the time the opportunity is visible, it's too late to start preparing; the dry powder either already exists or it doesn't. This generalizes to any domain with boom-bust dynamics — staffing, inventory, political capital — where the discipline of holding back reserves during good times, even at the cost of looking overly cautious, is what makes decisive action possible when conditions turn.