A cautionary statement or signal from legendary investor Warren Buffett regarding overvalued stocks, market bubbles, or impending corrections, often inferred from Berkshire Hathaway's massive cash reserves or his annual letters.

Reference to Buffett's timeless advice to 'be fearful when others are greedy,' amplified in recent contexts like 2026 market highs where his $187 billion+ cash pile signals restraint amid Wall Street exuberance.

An investor alert popularized by Buffett's sparse but stark market commentaries, urging patience over panic buying during euphoric rallies.