Oil scores biggest weekly gain since 2009MarketWatchOil futures settled higher Friday, with U.S. prices up by nearly 12% for the week as analysts mulled the likelihood of declines in production on the back of overall weakness in oil prices. October crude C …

CNBCJon Najarian buys beaten-down oil drillerCNBCA Seadrill semi-submersible drilling rig sits under construction in the dry dock at the Hyundai Samho Heavy Industries shipyard in South Korea. CNBC "Halftime Report" trader Jon Najarian bought sha …