Largest option buying in equities so far

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.

TD Ameritrade (AMTD): Investors bought about 41,000 August 23 calls, mostly for $0.20 and $0.25, looking for upside in the brokerage stock. AMTD fell 0.26 percent to $19.07. (See related story on InsideOptions Pro)

Repros Therapeutics (RPRX): Almost 6,400 May 12.50 calls were bought, mostly for $1.60 and $1.65. There was also selling in the March 10 calls, so an investor may have been rolling a position forward in time. RPRX fell 0.78 percent to $11.41.

Bank of America (BAC): A block of 15,000 May 9 puts was bought for $0.10, but volume was far below open interest at the strike. BAC fell 0.09 percent to $11.29.

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