US markets shrug off Brexit worries
(Close): Wall Street closed higher on Thursday after being under duress this week through uncertainty about the UK referendum.
The tech-heavy Nasdaq rose 10.51 to 4844.91.
Shares of pharmaceuticals firm Merck were 2.5% higher.
US crude prices fell 3.9% to $46.12 per barrel and Brent crude was 3.7% lower at $47.17 a barrel.