Stock Market Reacts to Rising Oil Prices Amid Conflict

U.S. stock indexes fall as rising oil prices and Middle East tensions impact investor sentiment and economic outlook.

Major U.S. stock indexes saw a significant decline on Thursday as investors began to factor in the potential ramifications of a renewed conflict in the Middle East. Following multiple nights of strikes by the U.S. against Iran, both oil prices and Treasury yields surged, pushing down domestic equities, which had initially remained steady despite the rising tensions.

The situation escalated dramatically when Brent Crude futures crossed the $100 per barrel mark—an increase that coincided with an uptick in the 10-year Treasury yield, which surpassed 4.7%, its highest since January 2025. The S&P 500 index was positioned for its biggest drop in a month, reflecting widespread concern over escalating geopolitical instability.

“These problems became too big to ignore,” stated Steve Sosnick, chief strategist at Interactive Brokers. He emphasized, “It’s too hard to ignore $100 oil. It’s too hard to ignore 10-year rates that are above 4.70%. It’s too hard for the stock market to ignore 30-year rates that are solidly above 5%.” This sentiment was echoed as U.S. West Texas Intermediate Crude futures rose, reaching $92 per barrel—marking a 28% increase from earlier lows.

As a reminder, the S&P 500 had already experienced a decline earlier in March, dropping more than 7.5% at its lowest point during the U.S.-Iran conflicts, with oil prices surging nearly 70%. Many analysts had previously noted worries about stagflation—a scenario where rising energy costs could reignite inflation and diminish consumer spending.

The markets had recently shown signs of optimism following a series of de-escalation announcements between the U.S. and Iran, which had contributed to a rebound in the S&P 500 during April and May. Investors initially felt reassured by a belief that President Donald Trump would find a way to deescalate the situation, mitigating risks associated with a prolonged military engagement.

JPMorgan equity strategists noted in a recent report that any equity weaknesses resulting from the conflict should be viewed as buying opportunities, as they expected an off-ramp and a formal agreement between the parties involved.

However, Sameer Samana, head of global equities and real assets at Wells Fargo Investment Institute, believes that the renewed conflict warrants a reassessment of economic fears. He cautioned that both inflated prices and their effect on consumer behavior could pose significant risks. Given current circumstances, he indicated traders should be preparing for a more considerable drawdown in equities.

Stocks were also reflecting expectations of a tighter borrowing climate for corporations, with the likelihood of a Federal Reserve rate hike next week climbing to nearly 38%. In contrast, these probabilities were at just 12% a week prior, showcasing the swift changes in market sentiment as the geopolitical landscape continues to shift.

While some analysts previously marveled at the stock market’s resilience in the face of escalating conflict, there now appears to be a consensus that the economic ramifications of prolonged tensions are too substantial to ignore. Michael Tanney, CEO at Pereon Wealth, commented, “If we have a sustained price above $120, that’s the breaking point where you’ll see serious trickle-down effects.” As the day progressed, investors were left anticipating how these developments would influence not only stock prices but the broader economic environment.