Iran’s qualified backing of an accord led by Saudi Arabia and Russia to cap output sowed doubts that the agreement can succeed in tempering a record global surplus. After talks with fellow OPEC members Qatar, Iraq and Venezuela in Tehran on Wednesday, Iranian Oil Minister Bijan Namdar Zanganeh expressed support for the output freeze without committing to restrain the nation’s own production, according to a report from oil ministry news service Shana. The country has signaled it plans to increase exports this year following the removal of international sanctions last month. Tuesday’s deal between Russia and Saudi Arabia was the first between OPEC and non-OPEC countries in 15 years and is the first coordinated response to the deepening crisis […]