This shocking tech stock is one of the year's best performers

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This shocking tech stock is one of the year's best performers

This shocking tech stock is one of the year's best performers
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This shocking tech stock is one of the year's best performers

by CNBC: Talking Numbers 2:46 mins

BlackBerry shares are up 22% so far this year. According to Andrew Left's Citron Research, it may be headed a lot higher. But, are they right?

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