Warren Buffett’s Berkshire Hathaway cash pile has soared to a record $381.7 billion, the largest in U.S. corporate history. The company added nearly $30 billion in one quarter, with most parked in 5.4% yielding Treasuries, earning over $20 billion a year. Buffett sold $14 billion more in stocks than he bought, signaling deep caution as the S&P 500 trades above 22 times earnings. Investors wonder if he’s waiting for a crash—or the perfect trillion-dollar deal. The Berkshire Hathaway cash pile now defines Wall Street’s mood.