They have increased their payouts for a combined 111 straight years.Ken Griffin is the founder and CEO of Citadel, a hedge fund established in 1990, whose long-term performance has been excellent. Citadel's track record suggests that Griffin knows a thing or two about how to beat the market, so it's not a bad idea to look into the fund's portfolio to get some ideas.During the second quarter, Griffin and his team purchased many stocks, including Coca-Cola (KO -0.83%) and Medtronic (MDT -0.15%). The fund incr ...