58% of Warren Buffett's $287 Billion Portfolio at Berkshire Hathaway Is Invested in Just 4 Unstoppable Stocks

Portfolio concentration is a big reason the Oracle of Omaha has been such a successful investor over six decades. In particular, Berkshire's 13F highlights what may well be Warren Buffett's best-known investment prowess: his penchant for portfolio concentration. Both he and now-late right-hand man Charlie Munger long believed in putting an outsize percentage of their company's capital to work in their best ideas. For decades, no money manager has commanded the attention of Wall Street professionals and ever ...