Brent, the international benchmark for oil prices, hit a session high of $80.50 a barrel on Thursday, its strongest level since Nov. 24, 2014, when it topped out at $80.85. The contract eased back to $79.19 by 2:25 p.m. ET, down 9 cents.
U.S. West Texas Intermediate crude ended the day unchanged from the previous session at $71.49 a barrel. WTI earlier hit a high going back to Nov. 28, 2014 at $72.30 a barrel.
President Donald Trump announced last week he would withdraw the United States from the Iran nuclear deal and restore wide-ranging sanctions on Iran. His administration is gave companies 90 to 180 days to wind down current business with Iran subject to sanctions.
more detail at: https://www.cnbc.com/2018/05/16/oil-markets-brent-edges-closer-to-80-per-barrel-on-tight-market.html