OPEC+ expects global oil markets to remain in deficit this year if it keeps output steady, according to data seen by Bloomberg that the Joint Technical Committee will review on Tuesday. Demand is poised to exceed supply by 1.7 million barrels a day in August, and the shortfall will average 1.9 million in the second half. Crude futures fell ahead of Thursday’s gathering of the alliance which is expected to boost production in August. However, the group may opt for caution amid uncertainty over an Iran nuclear deal.