Oil prices held steady on Monday following last week's heavy losses, as deepening U.S. trade wars fanned fears of a global economic slowdown but top oil exporter Saudi Arabia sought to calm markets. Saudi, the de-facto leader of OPEC, indicated that the group of oil producers together with Russia would continue managing global crude supplies to avoid a surplus. "We will do what is needed to sustain market stability beyond June. To me, that means drawing down inventories from their currently elevated levels," Saudi Energy Minister Khalid al-Falih said. Front-month Brent crude futures were at...