Fed drags on stocks; Big Oil's diminishing returns By: CNBC.com News October 31, 2013 at 10:11 AM EDT Big oil has problems: it's not just tough refining margins, but lower oil production that plagues them. Read More >> Related Stocks: Baker Hughes Inc ConocoPhillips EOG Resources Exxon Mobil Halliburton Co Marcus & Millichap Pioneer Natural Resources Schlumberger Ltd