) are lower on the session by 0.27%, currently trading at $82.06. 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 April 2012 $82.50 call, which has traded 10,000 times on open interest of 178 contracts. Calls are outpacing puts today by 7 to 1. McKesson Corporation provides medicines, pharmaceutical supplies, information and care management products and services across the healthcare industry.