Intensified fighting between the United States and Iran over the weekend triggered fresh concerns about economic consequences, even as stock market indices remained relatively resilient. The U.S. completed its 10th consecutive night of strikes against Iran on Monday, following a Houthi-declared maritime embargo targeting Saudi Arabia. A third service member death during recent operations raised concerns about the conflict potentially entering a more prolonged and severe phase. President Trump signaled a commitment to retaliation through public statements.
Despite the escalation, equities showed limited immediate reaction. The S&P 500 declined only modestly on Monday following a weak week and remained approximately 2% below its all-time high established in June. Since bottoming at 6,343.72 in late March, the benchmark had recovered substantially, driven largely by investor expectations that neither side desired full-scale war due to mutual economic risks. Market participants shifted emphasis toward corporate fundamentals as second-quarter earnings reports emerged with positive momentum, and recent inflation data came in softer than anticipated.
However, rising energy costs posed a complicating factor. Brent crude briefly exceeded $90 per barrel on Monday and remained near that threshold on Tuesday. The U.S. 10-year Treasury yield climbed above 4.6%, a closely monitored level for market participants. Strategists noted that sustained elevated oil prices could force analysts to adjust earnings forecasts downward and potentially trigger broader equity market corrections. The technology sector, representing 38% of the S&P 500 by weight, appeared better insulated from energy cost pressures compared to the energy sector’s 3% weighting. Financials and healthcare also showed relative resilience.
Economists emphasized downside risks to consumer spending and broader economic growth. Energy-dependent companies like Ryanair reported booking delays attributable to Middle East concerns. Analysts highlighted particular sensitivity around the Strait of Hormuz, a critical shipping passage. The average American household faced estimated losses of approximately $1,100 from the conflict when accounting for elevated energy costs and military expenses. The personal savings rate declined to 3% in May, down nearly 2 percentage points year-over-year, suggesting consumers had increasingly relied on savings to maintain spending levels as fuel costs rose. Gasoline prices reached $4 per gallon on Monday for the first time in over a month. While higher energy costs typically elevate headline inflation readings, core inflation excluding volatile energy and food prices faced less upward pressure, potentially keeping Federal Reserve policy unchanged.
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