Oil jumps to $100 per barrel and stocks sink worldwide with no clear end in sight for the Iran war

Gregg Maloney works on the floor at the New York Stock Exchange in New York, Tuesday, March 10, 2026. (AP Photo/Seth Wenig)

With no clear end in sight, the war with Iran sent oil prices back to $100 per barrel on Thursday, and stocks sank worldwide.

The S&P 500 fell 1.5% and resumed its sharp swings following a couple days of relative calm. The Dow Jones Industrial Average dropped 739 points, or 1.6%, and the Nasdaq composite lost 1.8%.

The center of action was again the oil market, where the price of a barrel of Brent crude, the international standard, climbed 9.2% to settle at $100.46. Worries are worsening that the war could block the production of oil in the Persian Gulf for a long time and cause a debilitating surge of inflation for the global economy.