Oil futures turned negative in early April after U.S. crude inventory figures suggested that the market was still heavily supplied.
Estimates from the US Energy Information Administration report that domestic output is continuing to climb. Stockpiles at the US crude hub in Cushing Oklahoma rose by 276,000 barrels in a week.
Brent oil prices went up meanwhile as Saudi Arabia was said to be pushing Opec members to prolong supply cuts beyond June.
Coupled with fresh military interventions in Syria and Afghanistan, and the ever-increasing noises re North Korea, oil prices were on the up.
The dollar also weakened slightly against all currencies on the announcement by the Trump administration that the dollar was too strong, and they want it to weaken.
With oil priced in dollars it evened out the increases slightly.
