The rating on the stock of the biggest US maker of mobile phones was raised to “buy’’ from “hold’’ at Citigroup Inc., which said the Schaumburg, Ill., company is introducing a compelling lineup of handsets. Motorola’s shares reached their highest price since Sept. 16. A rival didn’t fare quite so well. Research In Motion Ltd. fell 5.1 percent after the BlackBerry maker was cut to “sell’’ from “buy’’ at Citigroup.![]()
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