Whitney Tilson

Whitney Tilson, the outspoken founder of hedge fund T2 Partners LLC, is girding for a deeper mortgage market meltdown after being singed in his first foray into the credit crisis' most toxic of securities -- subprime bonds. Tilson and partner Glenn Tongue have halted their move into the U.S. mortgage bond market, where an investment gone awry in one risky bond in late 2008 led them to rein in risk.

Without doubt, timely and democratic access to financial and market information contributes to smoothly functioning financial markets. But it’s worth asking whether the ubiquity of such information today is a friend or foe of sound investment decision-making. For all but the most active professional traders, the answer is often “no”.

The biggest problem, as studies have shown, is that investors tend to over-react to news, so its 24/7 availability harms their long-term success.

Whitney Tilson says "Recent stock market moves have made anyone short financials look pretty dumb, but nearly every piece of data (with one notable exception -- see below) indicates that this is yet another dead cat bounce, to be followed by the fundamentals getting even worse, dragging stocks exposed to this mess down with it."

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Whitney Tilson of T2 partners appeared on CNBC fast money and commented on the housing market.

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This is a great video in which Whitney talks about investing ideas based on filings. Topics include Ackman, Target (TGT), Lampert, Icahn and others..

Fortune asked 13 money managers (John Neff, Leon Cooperman, Michael Steinhardt etc) about the current downturn, and what they're buying (or not buying) now.

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There's a wide diversity of opinion on portfolio concentration versus diversification. Few, of course, would argue for the extremes: owning only one or two stocks invites potential disaster (ask those whose entire retirement portfolio consisted of Lucent or Enron stock), while owning hundreds makes it very difficult to outperform the market.

Read Whitney Tilson's presentation on EMC, Resource America and Berkshire Hathaway.

Whitney Tilson of Tilson Mutual Funds talks about his unusual route to money management on WealthTrack.

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