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Billionaire Warren Buffett's 13-Month-Long Warning to Wall Street Can't Be Ignored

Core Insights - Warren Buffett, the CEO of Berkshire Hathaway, has not purchased shares of his own company for 13 consecutive months, raising concerns about stock valuations [9][12][14] - Buffett has been a net-seller of equities for the last 11 quarters, totaling $177.4 billion in net sales, indicating a shift in his investment strategy [6][7] - The market cap-to-GDP ratio, known as the Buffett Indicator, recently reached 221%, significantly above the historical average of 85%, suggesting overvaluation in the market [8] Company Overview - Berkshire Hathaway has a substantial investment portfolio valued at $304 billion, with stakes in around 50 publicly traded companies and the acquisition of approximately 60 companies under Buffett's leadership [5] - Buffett's investment philosophy emphasizes value, and he has historically avoided buying back shares unless they are priced attractively relative to book value [10][11] Investment Strategy - The lack of share repurchases and net-selling activity signals that Buffett believes current valuations do not align with intrinsic value, even for his own company [12][13][14] - Buffett's historical approach has been to wait for favorable valuations before making investment decisions, demonstrating a long-term perspective [15][21] Market Context - The U.S. economy has experienced 12 recessions since World War II, with average downturns lasting about 10 months, while economic expansions tend to last significantly longer, reinforcing Buffett's belief in the importance of patience in investing [18][19][20]