The group of oil-producing countries supplied more than 25 percent of the world’s oil before the war in Iran. Its members have influenced energy markets through

The measures aim to crack down on Iran’s shadow banking system and Chinese purchases of Iranian oil.

The jump on Tuesday of 1.6 percent was the highest percentage increase in more than a month.

The energy giant said it had seen an "exceptional" performance at its oil trading business.

Oil prices rose as investors parsed fresh signals from U.S.-Iran negotiations, with uncertainty over a potential de-escalation keeping markets on edge.