Pre-Open Winners 6/18: (XG) (ELT) (ARNA) Higher (more...)

Below are stocks making moves higher in pre-open trading Monday:

WINNERS:

• Extorre Gold Mines Limited (NYSE: XG) 52% HIGHER; Acquired by Yamana Gold (NYSE: AUY)
  
• Elster Group SE (NYSE: ELT) 18% HIGHER; takeover offer
  
• Arena Pharmaceuticals, Inc. (Nasdaq: ARNA) 4% HIGHER; continued upside ahead of 6/27 PDUFA
  
• Groupon, Inc. (Nasdaq: GRPN) 4% HIGHER; upgraded
  
• VeriFone Systems, Inc (NYSE: PAY) 2% HIGHER; upgraded
  
• Nabors Industries Ltd. (NYSE: NBR) 2% HIGHER; positive Barron's article
  
• Scotts Miracle-Gro (NYSE: SMG) 1% HIGHER; positive Barron's article
  
• St. Jude Medical Inc. (NYSE: STJ) 1% HIGHER; upgraded
  
• International Game Technology (NYSE: IGT) 1% HIGHER; upgraded

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