Reuters | Oil flat in subdued trade, focus remains on supply surplus Reuters LONDON Oil prices were flat on Monday but remained on an unstable footing as increases in U.S. drilling activity undercut an OPEC-led push to tighten supply. Trading was subdued due to public holidays in China, the United States and Britain, but the ... Oil prices flatten out as investors ponder what's next after OPEC meeting Oil Trades Below $50 as Market Pessimism Over OPEC Deal Lingers Shaken Opec seeks to work alongside shale oil producers |