The first time the Dow Jones Industrial Average hit 12,000, in October 2006, presenters on cnbc, a business channel, almost caught fire with excitement. When it reached that milestone again on February 1st the reaction was more muted, though the recovery from a low of 6,547 less than two years ago is remarkable, and soaring share prices reflect a corporate America that is leaner and stronger than it was back in 2006.
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