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

by | Oct 22, 2026 | Stock Market

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

Fighting between the U.S. and Iran intensified over the weekend, with the U.S. completing its 10th consecutive night of strikes on Monday following a Houthi-declared maritime embargo against Saudi Arabia. The escalation followed a third service member fatality in recent fighting. Despite these developments, equity markets showed limited immediate reaction, with the S&P 500 posting only modest declines on Monday and remaining approximately 2% below its all-time high established in June. The index had previously recovered from a closing low of 6,343.72 in late March.

Market participants have largely maintained their view that neither superpower desires a return to full-scale conflict, given the potential for economic recession that would harm both sides. Investors have accordingly focused on corporate fundamentals and recent earnings strength during the second-quarter reporting season. Softer-than-expected inflation data from the previous week also contributed to market sentiment. However, analysts noted that sustained movements in oil and bond markets could force reassessment of inflation trajectories and monetary policy. Brent crude briefly exceeded $90 per barrel on Monday and remained near that level the following day, while the U.S. 10-year Treasury yield traded above 4.6%.

Economists expressed concern about prolonged energy price elevation. Brent crude sustained levels above $85 to $90 per barrel through year-end could necessitate downward revisions to earnings estimates, according to market strategists. The technology sector, representing 38% of S&P 500 weighting and relatively insulated from energy cost pressures, could provide support. The energy sector, comprising just 3% of the index, and logistics companies faced greater headwinds. Airlines including Ryanair reported weakened results attributable to delayed bookings related to Middle East developments.

Consumer-side impacts drew particular concern. Gasoline prices reached $4 per gallon on Monday for the first time in more than a month. Economists estimated the average American household had already incurred approximately $1,100 in losses from the conflict, including energy cost increases and higher military expenditures. The personal saving rate declined to 3% in May from approximately 5% one year earlier, raising questions about consumer resilience if energy costs remained elevated. The Federal Reserve was expected to maintain interest rate stability at its upcoming meeting, with futures markets indicating an 83% probability of unchanged policy.

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