Puts Purchased on Thoratec Corporation (THOR)

Shares of Thoratec Corporation THOR are lower on the session by 1.32%, currently trading at $31.30. The stock has been moving largely higher over the past three months and is currently trading above the 50-day moving average. Options traders are buying puts on the name today. A short while ago the May 2011 $29.00 put was purchased 900 times, on the offer, on open interest of 1,006 contracts. Overall put volume is now running at 4.59x the daily average with 86% of all puts traded being purchases on the offer. Thoratec Corporation is a manufacture of mechanical circulatory support with a product portfolio to treat a range of clinical needs for advanced heart failure patients. The company develops, manufactures and markets medical devices used for circulatory support.