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.

Molina Healthcare (MOH): An investor sold 3,000 June 40 calls for $4 and rolled his or her position into the December 45 calls, which they bought for $2.20. The transaction freed up $1.80 of capital and provided another six months of upside exposure to the health-services provider. MOH rose 0.66 percent to $44.37.

Steel Dynamics (STLD): An investor sold 3,100 June 18 calls, probably exiting a long position ahead of expiration on Friday. STLD rose 2.76 percent to $17.86.

iShares China Large-Cap Fund (FXI): An investor bought 20,000 November 35 puts for $1.01, bracing for a pullback in the country's stock prices. FXI fell 0.07 percent to $38.

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