Berkshire Hathaway, led by Warren Buffett, has become a major player in the U.S. Treasury-bill market, holding $314 billion, or about 5% of all outstanding short-term government bills, as of March. Buffett indicated a willingness to spend up to $100 billion on the right investment opportunity, emphasizing the strategic value of cash. Despite a recent drop in operating earnings, the company remains poised for future acquisitions.