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Options Bulls Take Heart in Thoratec

David Russell|writer, OptionMonster
Monday, 3 Oct 2011 | 8:02 AM ET

Option traders are turning bullish on medical-technology company Thoratec, which is holding its ground as other stocks have struggled.

The company, which makes blood-circulation devices, has refused to break below its 200-day moving average around the $30 level. The stock has received positive comments recently from analysts at firms including Barclays Capital, Credit Suisse, and Oppenheimer.

The bullishness has taken shape since April 18, when THOR gapped higher amid news that a rival's products caused potentially fatal blood clots. Management also raised guidance the last time earnings came out on Aug. 3.

Friday's option activity focused on the October 35 calls, with about 2,000 contracts purchased for $0.90 to $1.10, according to OptionMonster's real-time tracking systems. The stock closed down 1.6 percent to $32.64, so those traders are looking for a rally of at least 10 percent in the next three weeks. Volume was 8 times open interest in the strike.

More than 2,400 calls traded in the session versus less than 60 puts. Total options turnover was 900 percent greater than average.

Second Opinion: A Thoratec Pop...Will It Last?

—Russell has no positions in THOR.

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David Russell is a reporter and writer for OptionMonster.

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