BUZZ-BlackBerry Ltd: Shares rise as Q1 software revenue soars
** Canadian smartphone maker's U.S.-listed shares up 8 pct at $9.97 premarket - most heavily traded among Nasdaq-listed stocks
** Company, which is trying to focus on its software business, says revenue in that business more than doubled to $137 mln in Q1 from a year earlier
** "Based on our initial take, the highlight in the quarter was the very strong software revenue performance," UBS analysts write in a note
** Q1 revenue $658 mln, slightly lower than Q4, showing signs of stalling
** Up to Monday's close, Toronto-listed stock of BlackBerry had risen nearly 8 pct over the last 12 months
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