In December of 2009, the Wall Street Journal ran an article titled Best Stock Fund of the Decade. For the ten year period from 1999 until 2009 the CGM Focus Fund on average gained 18% per year. Achieving 18% per year returns would mean an investor could double their money every 4 years. As an example, $100k invested over a 10 year period would turn into $600k. Ironically, the average investor in this fund ended up losing an estimated 11% per year based on dollar weighted returns. Many investors due to behavioral emotions invest at the highs, and sell at the lows which is what happened here.