TORONTO (Reuters) - Shares of beleaguered Canadian smartphone maker BlackBerry Ltd jumped briefly in active afternoon trading on Friday after a Citron Research note praised the company's recent strategic direction and issued a $15 price target. BlackBerry's New York-listed shares jumped about 20 cents shortly before 1 p.m. ET (1800 GMT), immediately after Citron Research tweeted a link to its report. The stock briefly topped $9, but fell back, and was last up 3.5 percent for the day at $8.86. Citron is run by California-based investor Andrew Luck, who is better known for short-selling stocks. ...

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