MARKET PULSE-AIG, Nu SKin, Hanger, Twitter, Office Depot, Fluidigm
(For more market insights, including options activity, click on ; for the Day Ahead newsletter http://link.reuters.com/mex49s; for the Morning News Call newsletter, http://link.reuters.com/nex49s) U.S. stocks fell on Tuesday as AIG weighed on financial shares after disappointing earnings and a
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