Notable Call Options Activity in MarkWest Energy Partners

Shares of MarkWest Energy Partners

are lower on the session by 3.21%, currently trading at $59.54. 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 focusing on calls today. The strike seeing the heaviest volume is the March 2012 $60 call, which has traded 3,100 times on open interest of 5,349 contracts. Calls are outpacing puts today by 4 to 1. MarkWest Energy Partners, L.P. is a master limited partnership engaged in the gathering, processing and transportation of natural gas; the transportation, fractionation, storage and marketing of NGLs, and the gathering and transportation of crude oil.