Cowen Downgrades Two-Thirds Of E&P Coverage Portfolio By: Benzinga via Benzinga September 08, 2015 at 13:03 PM EDT In a report published Monday, Cowen And Company analyst Ryan Oatman suggested that companies within the Oil & Gas Exploration ... Read More >> Related Stocks: Abraxas Petro Corp Callon Petroleum Company Diamondback Energy Energen Corp Eni ADR [Cdi] Northern Oil and Gas Oasis Petroleum Inc Parsley Energy Pdc Energy Inc QEP Resources iPath Dow Jones-Goldman Sachs Crude Oil Fund