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  • Are social media companies over valued?

  • 00:05:26
  • BBC News
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Are social media companies over valued?

As analysts express concerns that social media companies are overvalued, David Grossman considers what chance there is of another dot com crash.

BBC News | April 5, 2011Watch more videos from BBC News

Tags:. .overvalued. .grossman. .dot. .analysts. .chance