Building a concentrated portfolio is critical for investment success. THE WARREN BUFFETT PORTFOLIO introduces the next wave of investment strategy, called focus investing. A comprehensive investment strategy used with spectacular results by Buffett, focus investing directs investors to select a concentrated group of businesses by examining their management and financial positions as compared to their stock prices. A strategy that has historically outperformed the market, focus investing is based on the principle that a shareholder's return from owning a stock is ultimately determined by the economics of the underlying business.