As the U.S.-Iran war heats up again, these parts of the stock market and economy could be affected

by | Oct 31, 2026 | Stock Market

As the U.S.-Iran war heats up again, these parts of the stock market and economy could be affected

Intensified military operations between the U.S. and Iran over the weekend prompted Wall Street to reassess potential economic consequences from the conflict. The U.S. conducted its 10th consecutive night of strikes against Iran on Monday following a Houthi maritime embargo declaration against Saudi Arabia, while a third service member death raised concerns the conflict could enter a more protracted and destructive phase. President Trump signaled commitment to continued retaliation through public statements.

Despite the geopolitical escalation, equity markets demonstrated resilience. The S&P 500 experienced only marginal losses following what had been a weak preceding week and remained approximately 2% below its all-time high established in June. The index had recovered significantly since closing at 6,343.72 in late March. Market participants attributed this relative stability to expectations that neither the U.S. nor Iran desired full-scale warfare given the mutual economic costs and recession risks. Investment focus shifted toward corporate fundamentals, with second-quarter earnings momentum and recent softer-than-expected inflation data supporting investor sentiment.

Concerns centered on elevated energy prices and bond yields. Brent crude briefly exceeded $90 per barrel on Monday and remained near that threshold, while the U.S. 10-year Treasury yield traded above 4.6%, a closely monitored benchmark. Market strategists warned that sustained elevated oil prices and Treasury yields could force downward revisions to earnings estimates and potentially trigger market corrections if conditions persisted through year-end. Technology, representing 38% of S&P 500 weighting, remained positioned to outperform given its relative insulation from energy costs, while energy and logistics sectors faced headwinds.

Economists expressed broader concern about consumer impacts and inflation dynamics. Moody’s Analytics estimated average American households had lost approximately $1,100 from the conflict through increased energy and military costs. Gasoline prices reached $4 per gallon on Monday for the first time in more than a month. The personal saving rate declined to 3% in May from approximately 5% a year prior, constraining households’ ability to offset higher energy expenses. While some inflation pressure appeared likely, core inflation excluding food and energy might not accelerate proportionally, potentially keeping Federal Reserve rate decisions unchanged.

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