US stocks tumble as Iran war sparks worst energy shock in history
IEA warns supply disruptions exceed 1970s oil crises as Trump issues ultimatum over Strait of Hormuz
US stocks are facing renewed pressure as the escalating conflict in Iran triggers what the International Energy Agency has called the "greatest global energy security threat in history." The S&P 500 fell nearly 1% on Friday to four-month lows, with prediction markets indicating only a 30% chance of a positive open for the benchmark index on Monday as markets brace for further volatility.
Brent crude has surged to $112-113 per barrel, while West Texas Intermediate trades near $98-99, representing more than a 50% increase since the conflict began in late February. The price spike follows an effective blockade of the Strait of Hormuz, the vital waterway through which approximately 20-25% of the world's oil and liquefied natural gas supplies normally pass. The disruption has removed 11 million barrels per day of oil supply from global markets—a figure exceeding the combined impact of the two 1970s oil crises.
IEA Executive Director Fatih Birol warned that even if the Strait reopens immediately, restoring normal oil and gas flows could take six months or longer due to damage to regional energy infrastructure. The agency's 32 member countries unanimously agreed on March 11 to release 400 million barrels from emergency reserves—the largest such intervention in IEA history—yet the move has done little to stem the price surge.
President Donald Trump issued a 48-hour ultimatum to Iran on Saturday, threatening to "obliterate" the country's power plants if the Strait of Hormuz is not reopened by Monday evening. Iran's military has responded with threats to attack US and Israeli energy and infrastructure assets across the Middle East. The escalation has raised concerns about further supply disruptions beyond the current 11 million barrel per day shortfall.
The energy shock is rippling through the US economy. Average gasoline prices have climbed to $3.79-3.88 per gallon nationally, with California motorists paying $5.66 at the pump, according to recent data. Analysts warn that if crude prices reach $150 per barrel, retail gasoline could approach $5 per gallon nationwide. Every $10 increase in crude oil prices typically translates to approximately a 25-cent rise at the pump.
Rate-sensitive sectors have borne the brunt of the market's sell-off. Utilities and real estate stocks both dropped more than 3% on Friday as the 10-year Treasury yield climbed to 4.41%. The surge in energy prices has abruptly shifted market expectations for monetary policy, with futures now pricing in a 48.4% probability of a Federal Reserve rate hike by October—a complete reversal from earlier expectations of rate cuts.
The Invesco S&P 500 Equal Weight ETF, which tracks the average stock performance rather than market-cap weighted returns, has fallen 6.23% month-to-date, indicating that the pain is broadly distributed across the market rather than concentrated in mega-cap technology shares. The energy sector remains the lone area of gains as oil and gas producers benefit from the price spike.
Economists at Moody's Analytics estimate a 49% chance of a US recession within the next 12 months, a figure that could exceed 50% if oil prices remain elevated. Historical patterns show that every US recession since World War II, except the pandemic-induced downturn, has been preceded by rising oil costs. Sustained prices of $130 per barrel for several months or $140 for two months could trigger a recession by forcing consumers to cut discretionary spending and businesses to reduce staffing.
The conflict's economic fallout is expected to persist well into 2027, with Birol emphasizing that "no country will be immune" to the crisis's effects. As the 48-hour deadline approaches and markets await Iran's response, investors face mounting uncertainty over whether the worst energy disruption in modern history will escalate further.