The first is from Peter Thiel, the hedge fund investor behind the financing of Facebook.

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These questions are raised once again by this latest batch of stockmarket advisories, a set of four books which advocate everything from the slothful approach of Burton Malkiel's indexers to Peter Krass's hedge funders and options traders.

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That concern also weighed on U.S. markets Monday, said Peter Tchir, who runs the hedge fund TF Market Advisors.

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Peter Thiel, Goldman Sachs and hedge fund star Chase Coleman, who all sold huge amounts of Facebook stock the first chance they got, should have made it clear to anyone who was paying attention that there would be a lot of fast insider selling.

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"Frankly, most people were just checking boxes and not doing due diligence on any of these investments, " says analyst Peter Fusaro, president of the Energy Hedge Fund Center.

FORBES: Magazine Article

In the hedge-fund world and the U.S. mutual fund business, star managers like Peter Lynch, George Soros and Julian Robertson became household names on the heels of their impressive investment performances.

FORBES: Constellation manager