Reuters | Oil retreats from session high, heads for weekly decline Reuters NEW YORK Oil prices were little changed on Friday in a see-saw session, retreating from session highs and headed for weekly declines on lingering questions about whether OPEC will extend output cuts at its May meeting and whether it will reduce a ... Oil rises from one-month low on hopes of output deal extension Oil Set for Monthly Drop as OPEC Cuts Battle Rising U.S. Output Oil Edges Up as Investors Cash Out for Weekend |