Trading the OPEC Oil War: Dennis Gartman By: CNBC.com News May 28, 2013 at 17:45 PM EDT A shale boom in the United States makes a winning oil trade available closer to home, Dennis Gartman of The Gartman Letter says. Read More >> Related Stocks: Anadarko Petroleum Apache Corp Devon Energy Halliburton Co Schlumberger Ltd US Oil & Gas Explor & Prod Ishares ETF