By NICK BILTON
Though Silicon Valley insists there is not a technology bubble, average investors should be cautious, especially when many highly valued companies have yet to produce earnings.
Published: November 24, 2013 at 12:00AM
from NYT Technology http://bits.blogs.nytimes.com/2013/11/24/disruptions-if-it-looks-like-a-bubble-and-floats-like-a-bubble/
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