Largest option buying in equities so far

optionMONSTER

Nearing the halfway mark in today's session, here are the individual equity names with the most call and put buying on optionMONSTER's ActionTracker data system.

Staples (SPLS): More than 31,000 September 15 calls were bought for $0.70 to $0.80 as bullish activity continues in the office supplier. SPLS rose 0.59 percent to $13.74.

Red Hat (RHT): A block of 10,000 February 57.50 calls was bought for $0.40. A large block of shares was sold seconds later, indicating the use of a delta-neutral strategy. RHT fell 0.84 percent to $54.60.

Halozyme (HALO): More than 5,800 March 7.50 puts were sold and rolled to the June 7.50 puts as an investor extended a protective position in the developer of biopharmaceutical products. HALO rose 0.87 percent to $8.10.

Anadarko Petroleum (APC): Some 15,000 March 75 calls were bought for $7.25, but volume was far below open interest at the strike. APC fell 0.26 percent to $80.35.

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