BUZZ-BlackBerry Ltd: Buys mobile security software maker
** Canadian smartphone maker's U.S.-listed shares up 4 pct at $7.70 premarket
** Company buys mobile security software maker Good Technology for $425 mln in cash
** Deal boosts its ability to help companies manage smartphones that run any operating system, the company said
** Expects deal to close toward the end of company's Q3 2016, adding $160 mln in revenue within the first year of deal close
** Up to Thursday's close, stock had fallen 32 pct this year
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