The S&P 500 ended April at a fresh record high, with investors balancing concerns that the war in Iran could lead to longer disruption of fuel supplies from the Middle East against strong corporate earnings and data showing continued economic growth.
Investors were buoyed on Thursday after a report showed modest economic growth in the United States for the first three months of the year, boosted by investment in the infrastructure needed to power artificial intelligence.
Corporate earnings reports have also shown strong growth at the start of 2026. On Wednesday, Alphabet, Amazon, Microsoft and Meta said they had spent a collective $130 billion on data centers.
The S&P 500 rose 1 percent on Thursday, taking its gain in April to over 10 percent — its best month since November 2020. The benchmark index also posted its fifth straight week of gains for the first time since fall 2024.
The exuberance among stock investors is in sharp contrast to the turmoil in energy markets. On Thursday, oil prices briefly hit their own wartime peak, as the naval blockade of Iran’s ports showed no signs of ending.
President Trump has maintained his stance that the blockade will persist until Tehran gives up its nuclear program. Brent crude, the international oil benchmark, peaked at a four-year high of over $120 per barrel on Thursday, before pulling back to a loss for the day in volatile trading.
The average price of regular gasoline in the United States has followed oil higher, hitting $4.30 a gallon on Thursday, up 27 cents in a week, according to data from the AAA motor club.
“Markets are being pulled in opposing directions as surging oil prices and geopolitical risks weigh on sentiment, while strong tech earnings and A.I. optimism provide support,” Bob Savage, the head of markets macro strategy at BNY, wrote in a research note.
After the Federal Reserve held interest rates steady on Wednesday, Jerome H. Powell, the central bank’s chair, said that policymakers needed to be “very cautious” about their next steps, given the significant uncertainty about the economic outlook.
“We’re very well aware that people are experiencing higher gas prices all over the country now,” Mr. Powell said. “And that hurts.” He added that if energy costs remained high, the effects could filter through to airfares and other products and services dependent on oil. “People are going to start to feel that,” he said.
Higher energy prices and the lingering effects of Mr. Trump’s tariffs are expected to keep inflation elevated through the rest of the year, according to Bernard Yaros, the lead U.S. economist at Oxford Economics. “Inflation will get worse before it improves,” he wrote in a research report.
He added that it can take several months for the effects of energy shocks to hit the economy by weighing on job growth. “The labor market remains in a fragile ‘low-hire, low-fire’ equilibrium that risks being upset as the uncertain impacts of the war play out further,” he noted.
The World Bank estimated that the war in Iran would push energy prices up 24 percent this year, according to a broad index covering oil, gas and coal. As a result, the outlook for economic growth has “dampened materially,” the institution noted.
“The war is hitting the global economy in cumulative waves: first through higher energy prices, then higher food prices and finally, higher inflation, which will push up interest rates and make debt even more expensive,” Indermit Gill, chief economist of the World Bank, said this week.
The conflict has threatened growth in countries with fledgling recoveries. In Europe, the economy of the 21 countries that use the euro grew just 0.1 percent in the first quarter of the year, down from 0.2 percent growth at the end of last year, data published on Thursday showed.
The European Central Bank and Bank of England held interest rates steady on Thursday. But the central bankers made clear they were facing hard decisions for how they would weigh the jump in inflation against the risk of an economic slowdown when setting interest rates in the future.
Over the past two weeks, the price of Brent crude has risen about 30 percent. The price of Brent for June delivery, a soon-to-expire contract that investors trade based on their expectations for where prices will be in the near future, briefly traded above $126 a barrel, the highest since 2022. It then whipsawed back to $114.01 a barrel, a decline of more than 3 percent for the day. A barrel of Brent traded for $72 just before the war.
Part of the sharp rise on Thursday came from the expiration of the Brent contract for June, meaning it was the last chance for traders to secure oil for delivery in a month’s time. However, Brent’s July contract, which traded at around $110, as well as contracts for the months after, remain elevated.
West Texas Intermediate crude, the U.S. benchmark, eased slightly to $105.07 a barrel.
Investors and analysts are focused on the continued disruption to shipping in the Strait of Hormuz, the narrow waterway between Iran and Oman that normally carries as much as one-fifth of the world’s oil supply. Consumers are starting to feel the ripple effect from the energy supply crunch, putting a strain on the U.S. economy.
American households have received larger tax refunds this year because of a giant tax cut passed last year, cushioning the blow of higher energy costs. But the recent rise in gasoline prices has already soaked up about half of the increase in those refunds, according to analysts at Bank of America.
“Unless there is relief at the pump, the ‘gas tax’ should start to weigh increasingly on the consumer in coming months,” they wrote.
Eshe Nelson contributed reporting from London.
