Some of it is about the agenda of the person writing it.
The Fama-French 3 factor model still holds. (http://en.wikipedia.org/wiki/Fama%E2%80%93French_three-facto...) Part of this is because Gene Fama doesn't have a hedge fund on the side. He advises DFA, but they want their customers to understand the model. (He also won this year's Economics Nobel)
The Fama-French 3 factor model still holds. (http://en.wikipedia.org/wiki/Fama%E2%80%93French_three-facto...) Part of this is because Gene Fama doesn't have a hedge fund on the side. He advises DFA, but they want their customers to understand the model. (He also won this year's Economics Nobel)