) are higher on the session by 30.21%, currently trading at $9.18. The stock has been moving largely higher over the past two months and is currently trading above the 50-day moving average. Options traders are focusing on calls today. The strike seeing the heaviest volume is the January 2012 $10.00 call, which has traded 10,900 times on open interest of 278 contracts. Calls are outpacing puts today by 14 to 1. Idenix Pharmaceuticals, Inc. is a biopharmaceutical company engaged in the discovery and development of drugs for the treatment of human viral diseases with operations in the United States and Europe.