Stock Market Today: Dow ends lower but still logs fifth month of gains; Nasdaq and S&P 500 gain in August despite Brent oil above $90 and 30-year yields at 5.25%
US stock markets declined as the Dow fell 350 points and the S&P 500 and Nasdaq dropped following US strikes on Iranian rocket launchers and sites in the Strait of Hormuz. Brent oil prices surpassed $90 and 30-year yields reached 5.25% amid fears of escalation and war-driven inflation. While major indexes posted overall gains for August, recent volatility has increased as investors bet on rate hikes. Asian shares remain mixed as the US and Iran trade attacks resurrect risks of Middle East supply disruptions.
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- ✓ Brent oil prices topped $90.
- ✓ The US struck Iranian rocket launchers and sites in the Strait of Hormuz.
What changed
US military strikes on Iranian rocket launchers and sites in the Strait of Hormuz triggered a stock market slide and a surge in oil prices.
Live updates
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US Stocks Fall and Oil Prices Surge Following US Strikes on Iran
US stock markets declined as the Dow fell 350 points and the S&P 500 and Nasdaq dropped following US strikes on Iranian rocket launchers and sites in the Strait of Hormuz. Brent oil prices surpassed $90 and 30-year yields reached 5.25% amid fears of escalation and war-driven inflation. While major indexes posted overall gains for August, recent volatility has increased as investors bet on rate hikes. Asian shares remain mixed as the US and Iran trade attacks resurrect risks of Middle East supply disruptions.
Why it matters
Geopolitical instability in the Strait of Hormuz directly impacts global energy costs and inflation expectations. These tensions are coinciding with high Treasury yields, complicating the market's recovery from previous volatility. The situation creates a conflict between August's general upward trend and immediate security risks.
What is confirmed
- The Dow fell 350 points.
- Brent oil prices topped $90.
- 30-year yields hit 5.25%.
- The US struck Iranian rocket launchers and sites in the Strait of Hormuz.
- Oil prices rose following attacks between the US and Iran.
- Major stock indexes posted gains for August.
Still unconfirmed
- Donald Trump threatened fresh strikes on Iran.
- PG&E shares plunged.
What to watch next
- Further military responses from Iran
- Changes in US interest rate hike projections
- Stability of oil supply from the Strait of Hormuz
confidence 90%Sources used for this update (10)
- AP News — Asian shares are mixed and oil prices surge after US strike on Iranian rocket launchers
- Yahoo Finance — Stock market today: Dow, S&P 500, Nasdaq futures fall as US strikes Iran, rate-hike bets jump
- The New York Times — Global Oil Prices Jump After U.S. and Iran Trade Attacks
- MarketWatch — Stock Market Today: Dow falls 350 points, S&P 500 and Nasdaq lower as Trump threatens fresh Iran strikes; Brent oil tops $90 and 30-year yields hits 5.25%
- Investor's Business Daily — Stock Market Today: Dow Skids, Oil Stocks Pop As Trump Says This On Iran; PG&E Plunges (Live Coverage)
- WSJ — U.S. Stocks Fall as Iran War Inflation Heats Up
- Investopedia — Markets News, Aug. 31, 2026: Major Stock Indexes Post Gains for August Despite Falling Monday Amid Rising Oil Prices
- Reuters — Oil prices rise as latest fighting resurrects Middle East supply disruption risks
- WRAL — Oil prices rise and stocks fall after US hits Iranian sites in the Strait of Hormuz
- Al Jazeera — Oil prices climb as US, Iranian attacks stoke fears of escalation
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