Notable Call Options Activity in Onyx Pharmaceuticals

Shares of Onyx Pharmaceuticals

are lower on the session by 0.50%, currently trading at $37.92. The stock has been moving largely lower over the past five weeks and is currently trading below the 50-day moving average. Options traders are focusing on calls today. The strike seeing the heaviest volume is the April 2012 $43.00 call, which has traded 1,020 times on open interest of 10 contracts. The May2012 $43.00 call also traded 1,000 times on 2,067 contracts. Calls are outpacing puts today by 4 to 1. Onyx Pharmaceuticals, Inc. is a biopharmaceutical company engaged in developing therapies that target the molecular mechanisms that cause cancer.