Largest option buying in equities so far

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.

Rite-Aid (RAD): More than 21,000 April 2 calls were bought, mostly for $0.10 and $0.15, as investors look for upside in the drugstore owner. RAD rose 3.71 percent to $1.82.

Seagate Technology (STX): More than 10,000 April 39 calls were bought, mostly for $0.59, as investors look for upside in the maker of computer disk drives. STX rose 1.15 percent to $35.72.

Yamana Gold (:AUY): More than 10,000 July 15 calls were sold, mostly for $0.75, as investors see little upside in the share price. They also bought the July 17 calls, either hedging the 15s or rolling a short position lower. AUY fell 0.14 percent to $14.20.

Morgan Stanley (MS): More than 60,000 March 22.50 puts were bought, mostly for $0.12, as investors position for downside in the share price. MS fell 0.22 percent to $22.73.

Aetna (:AET): Some 23,000 April 47 calls were sold for $0.24 against open interest and an equal number of April 50 puts was bought for $0.87 as an investor rolled a protective position higher. AET fell 0.80 percent to $51.05.

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