His logic??? The fed was his logic...the fed spent trillions to prop up the market....of course he's going to win...there is zero logic involved when the fed is pumping markets with trillions of dollars and creating a zero interest market environment....
This prediction was made in 2007 i.e. before the great recession so fed pumping in money to prop up the market can make only partial a case.
http://www.businessinsider.com/hedge-funds-and-sp-500-nearly-identical-2013-8
"And while the correlation between the two indices is almost 0.6, the beta of the hedge fund index has consistently been low - about 0.33 over the 20 year period."
Does this statement make any sense. A low beta instrument will underperform in a rising market.
There might another logic: HF industry is seeing consolidations i.e. fewer players with bigger funds. It is always tough to return high on a bigger fund until and unless you are playing mere 8-12 stocks like Bill Ackerman and taking high risks.