Why Marathon Oil Corporation (MRO), Viacom, Inc. (VIAB) and Zoetis Inc (ZTS) Are 3 of Today’s Worst Stocks By: InvestorPlace August 22, 2016 at 16:41 PM EDT Read More >> Related Stocks: CBS Corp Halliburton Co Marathon Oil Petrobras - Petroleo Brasileiro S.A. Viacom Zoetis