Investing.com - Oil futures continued their rebound early Monday as fears of Britain exiting the European Union eased and the dollar weakened.
U.S. crude rose 1.09% to $49.28 at 05:00 ET as Brent crude gained 1.57% to $49.94 after an intraday high of $50.30.
Campaigning for the Brexit referendum resumed on Sunday after a three-day halt in the wake of the murder of pro-EU MP Jo Cox.
Three polls ahead of the June 23 referendum showed support swaying in favour of a Remain vote.
The dollar index was down 0.5% as sterling and the euro gained on the easing of Brexit fears.
A weaker dollar underpins demand for oil.
Baker Hughes weekly rig data released Friday showed an increase in the number of rigs operating in the U.S of seven to 337, the third straight rise.
Higher U.S. output could fan global supply glut concerns.