FYI:  After retiring from active play, he became manager of the Oakland A’s.  His story was immortalized in Michael Lewis’s excellent book, Moneyball. In many ways, Billy Beane was like a stock market index.  Investors have a tough time handling them.  In fact, most people could make more money by taking less risk.  
Regards,
Ted
http://assetbuilder.com/andrew_hallam/how_to_take_less_risk_and_earn_better_investment_returnsBilly Beane's Record As GM 1998-Present:               12 Winning & 6 Losing Seasons
2015 Oakland Athletics American League 25 38 .397 
2014 Oakland Athletics American League 88 74 .543 
2013 Oakland Athletics American League 96 66 .593 
2012 Oakland Athletics American League 94 68 .580  
2011 Oakland Athletics American League 74 88 .457 
2010 Oakland Athletics American League 81 81 .500  
2009 Oakland Athletics American League 75 87 .463 
2008 Oakland Athletics American League 75 86 .466 
2007 Oakland Athletics American League 76 86 .469  
2006 Oakland Athletics American League 93 69 .574  
2005 Oakland Athletics American League 88 74 .543 
2004 Oakland Athletics American League 91 71 .562  
2003 Oakland Athletics American League 96 66 .593  
2002 Oakland Athletics American League 103 59 .636 
2001 Oakland Athletics American League 102 60 .630  
2000 Oakland Athletics American League 91 70 .565  
1999 Oakland Athletics American League 87 75 .537 
1998 Oakland Athletics American League 74 88 .457             
 
            
Comments
Does anyone besides me think this initial paragraph sucks? Even a mediocre phenom exceeds theses stats.
If you have a moderate amount of savings, buy a retirement fund dated 10 years after you plan to retire to achieve an adequate stock percentage; if not, buy a date close to actual retirement.
If you have quite a lot of money, get professional advice, hopefully from someone who understands "Moneyball" as an investment approach.