Groupon Jumps Most Since April After Piper Jaffray Upgrade

  • Analyst cites narrowed product and regional focus for rating
  • One-time tech darling has struggled since its 2011 IPO

Groupon Inc. jumped the most in three months Monday after analysts at Piper Jaffray Cos. upgraded its recommendation for the online marketplace, citing the company’s narrowed focus and marketing spending as driving growth.

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