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Largest option buying in equities so far

David Russell (david.russell@optionmonster.com)

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.

Clearwire (CLWR): Some 27,000 December 4 calls were bought for $0.10 as investors look for upside in the share price. CLWR rose 1.21 percent to $3.35.

National Bank of Greece (NBG): More than 65,000 August 1 calls were bought, mostly for $0.25 to $0.40, as investors look for upside in the beaten-down European lender. NBG rose 20 percent to $1.09.

Yahoo (YHOO): Almost 4,300 June 24 puts were bought, mostly for $0.53, as investors brace for downside in the Internet stock. YHOO fell 0.67 percent to $25.03.

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