By Euan Rocha TORONTO (Reuters) - Shares of struggling smartphone maker BlackBerry Ltd rose as much as 3.6 percent on Tuesday after Microsoft's move to acquire Nokia's handset business reignited investor optimism that BlackBerry too would find a buyer. BlackBerry officially put itself on the block a few weeks ago in the face of lackluster sales for its new line of smartphones, and some analysts have been skeptical about whether it would be able to attract bidders as its business has shrunk. ...



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