Five lessons from a seasoned fund manager who knows how to beat the stock market By: MarketWatch November 28, 2017 at 05:04 AM EST Brian McMahon at Thornburg Investment Management places concentrated bets on companies with few rivals. By Michael Brush. Read More >> Related Stocks: Aena Sme S.A. Alphabet-A Baidu.com SP ADR Citigroup Enel Societa Per Azi ADR New World Dev Ltd ADR Ryanair Hlds Plc ADR T-Mobile US