Oil prices climbed above $90 per barrel and U.S. stocks moved lower after renewed fighting between the United States and Iran raised fresh concerns about energy supplies moving through the Strait of Hormuz.
Associated Press reported that Brent crude rose 2.8% to $90.59 per barrel after U.S. forces struck Iranian rocket-launcher positions near the strait. The military action was the first direct U.S. strike on Iranian forces in about a month.
The Strait of Hormuz is one of the world’s most important energy corridors. Continued disruption has reduced normal oil flows through the region and kept traders focused on the risk that military escalation could further restrict exports.
Higher crude prices can move quickly into transportation and consumer costs. U.S. gasoline prices remained above $4 per gallon through August, adding to household expenses and complicating efforts to bring inflation under control.
The S&P 500 fell about 0.5% in the latest session, while the Dow Jones Industrial Average dropped 333 points and the Nasdaq Composite declined about 0.4%. Energy companies benefited from higher oil prices, but much of the broader market moved lower.
Bond yields also edged higher as investors considered whether persistent energy inflation could force the Federal Reserve to maintain tighter monetary policy or raise rates again.
The economic consequences of the Iran conflict extend well beyond the combat zone. Energy prices affect transportation, manufacturing, food distribution, airline costs, household budgets and inflation expectations across the global economy.
This makes the story appropriate for Business even though its cause is geopolitical. The immediate question for markets is whether the latest military exchange remains contained or leads to additional disruption in one of the world’s most important oil-export routes.
Associated Press — Oil prices rise and stocks fall after US hits Iranian sites in the Strait of Hormuz. August 31, 2026.