Spencer Jakab provides this balanced perspective on Buffett's performance as an investor. Breaking the past 25 years into five periods gives a sense of how Buffett has fared in recent years compared to his performance in the early years. In the latest period since 2010 Berkshire stock has outperformed the market by a mere 0.9% annually. In the period 1995-1999 Berkshire performance trailed the S&P 500 significantly, making up for this in the next 5 years. As Berkshire became larger it was harder to generate results of the period around 1975. In that year returns were 129.3%. In 2015 Berkshire had to take big stakes in large companies such as Kraft. Gains for 2009 were 2.7%, 2010 21.4%, and 2011 minus 4.7%. Showing that Buffett's principles and approach remained intact- invest in what you know and be careful to respect what you don't know, invest in companies and their prospects for the long run (an option not easily available to mutual fund managers who are judged yearly), invest in companies generating large cash flows. Yet as Jakab points out performance has gradually declined over the years....