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NEW YORK, NY - MAY 01:  The New York Stock Exchange is seen on Wall Street on May 1, 2012 in New York City. Following positive news of a rise in U.S. manufacturing activity, The Dow Jones industrial average rose almost 66 points, or 0.5%, to close at 13,279.40, the highest since December 2007.  (Photo by John Moore/Getty Images)
NEW YORK, NY - MAY 01:  The New York Stock Exchange is seen on Wall Street on May 1, 2012 in New York City. Following positive news of a rise in U.S. manufacturing activity, The Dow Jones industrial average rose almost 66 points, or 0.5%, to close at 13,279.40, the highest since December 2007.  (Photo by John Moore/Getty Images)

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Economist: Tech stocks 'a barometer of optimism'

Although tech stocks are tumbling, economist Max Wolff forsees a short list of global tech giants being around for years to come.

Economist: Tech stocks 'a barometer of optimism'

Although tech stocks are tumbling, economist Max Wolff forsees a short list of global tech giants being around for years to come.