Iran still faces constraints on oil exports as buyers are cautious about boosting trade immediately because of banking and ship insurance difficulties, a senior Iranian oil official said, despite seeing a “tangible” rise in shipments this month. Iran emerged from years of economic isolation in January when world powers led by the United States and the European Union lifted crippling sanctions against OPEC’s No.3 oil producer in return for curbs on Tehran’s nuclear ambitions. The sanctions had cut Iranian crude exports from a peak of 2.5 million barrels per day (bpd) before 2011 to just over 1 million bpd in recent years. Iran is working to regain market share after sanctions relief and exports had already risen by 500,000 bpd in February, Mohsen Ghamsari, director of international affairs […]