Largest option trades in equities

David Russell (

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.

Amarin (AMRN): More than 12,000 October 9 calls were bought, mostly for $0.20 and $0.25, as investors look for upside in the drug maker. AMRN fell 4.51 percent to $6.13.

Sprint (S): Some 4,000 November 7 calls were bought for 0.11 but volume was below open interest at the strike. S fell 2.24 percent to $6.12.

Seagate Technology (STX): More than 8,000 October 40 puts were bought, mostly for $0.77, as investors brace for downside in the maker of computer disk drives. STX fell 1.85 percent to $40.63. (See related story )

More From optionMONSTER