Oil prices jumped 5% on Thursday, with both major benchmarks trading at over $100 a barrel as the biggest spike in attacks on shipping since the Iran war began fed worries about further disruptions to already tight supplies.
Brent crude futures were up $5.39, or 5.33%, at $106.60 a barrel by 11:49 a.m. ET (1549 GMT). U.S. oil topped $100 a barrel for the first time since May as West Texas Intermediate crude futures rose $5.16, or 5.37%, to $101.21.