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• Update: Top unusual option activity
• Update: Top unusual option activity
• Top 10 list of unusual option activity

• FLML 0% Rate It
• IVR 100% Rate It
• RKT 100% Rate It
• WU 50% Rate It

As of today's close, here are the top 10 names showing unusual option activity on tradeMONSTER's data systems.

SunPower B-shares (SPWRB): Options volume 9,319 percent above average. Heavy call selling amid a tender offer for the solar-energy company by Total. SPWRB falls 2 percent to $20.57.

Western Union (WU): Options volume 8,355 percent above average. Call activity surged as investors looked to reap the money-transfer company's quarterly dividend. WU rose 1.77 percent to $20.11.

Invesco Mortgage Capital (IVR), with options volume 6,384 percent above average, also saw a dividend play. IVR fell 0.27 percent to $22.09.

Flamel Technologies (FLML): Options volume 5,776 percent above average. A position in 8,713 June 2.50 calls was rolled to the July 2.50 strike for a net cost of $0.05. FLML rose 0.35 percent to $5.77.

Rock Tenn (RKT): Options volume 3,968 percent above average. A block of 15,000 January 100 calls were sold for $0.45. RKT climbs 2.45 percent to $67.77.

Rounding out the rest of the top 10 are:

• SunPower A-shares (SPWRA): Options volume 2,690 percent above average.
• JC Penney (JCP): Options volume percent 2,061 above average.
• WMS Industries (WMS): Options volume 1,783 percent above average.
• Pharmacyclics (PCYC): Options volume 1,324 percent above average.
• Graham Packaging (GRM): Options 1,265 volume percent above average.
  
  
  
  
  
  (Chart courtesy of tradeMONSTER)

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