U.S. Markets Slide as Middle East Tensions Flare, Oil Prices Surge — But August Closed Strong

Wall Street Opens September in the Red as Geopolitical Risk Rattles Investors

U.S. equity markets kicked off September on a sour note Monday, with all three major indexes closing lower after a fresh escalation in Middle East hostilities between the United States and Iran sent crude oil prices sharply higher and stoked renewed uncertainty across global markets.

How the Major Indexes Finished

The Dow Jones Industrial Average (DJI) shed 374.09 points, or 0.7%, settling at 53,185.90. Of the index's 30 components, 24 finished the session in the red, while just six managed gains. The S&P 500 dropped 0.3% to close at 7,686.14, with six of its 11 sectors ending in negative territory and five posting advances.

The tech-heavy Nasdaq Composite held up slightly better in relative terms, slipping just 0.1% to finish at 26,370.89 — though the session still represented a drag driven by weakness in the technology space.

Sector performance was notably mixed. The Information Technology Select Sector SPDR (XLK) was among the hardest hit, falling 1.6%, while the Utilities Select Sector SPDR (XLU) declined 1%. On the positive side, the Communication Services Select Sector SPDR (XLC) gained 1.45% and the Consumer Discretionary Select Sector SPDR (XLY) advanced 1.2%.

Market anxiety was also visible in the CBOE Volatility Index (VIX), often referred to as Wall Street's "fear gauge," which rose 3.4% to 14.92. Trading volume came in at 15.65 billion shares — slightly above the 20-session average of 15.58 billion. On the NYSE, declining issues outpaced advancing ones by a ratio of 1.95-to-1, while the Nasdaq saw a 1.58-to-1 ratio favoring decliners.

U.S.-Iran Military Confrontation Escalates

The catalyst behind Monday's risk-off sentiment was a significant uptick in direct military conflict between the U.S. and Iran. On August 30, U.S. Central Command confirmed that American forces struck two rocket launchers located on Iran's Larak Island. Iranian state media subsequently reported that Tehran responded by attacking U.S. military installations in Jordan — marking the most serious escalation between the two nations since late July.

The geopolitical flare-up immediately translated into crude oil price spikes. West Texas Intermediate (WTI), the U.S. benchmark, surged 2.83% to settle at $85.76 per barrel, while Brent crude — the global reference price — climbed 2.71% to $90.49 per barrel.

Energy stocks were clear beneficiaries of the oil rally. Shares of Chevron Corp. (CVX) advanced 2.1%, while ExxonMobil Holdings Corp. (XOM) gained 2.7% on the session, as investors rotated into energy names seen as direct beneficiaries of higher commodity prices.

Treasury Yields Hit Multi-Month Highs

Beyond energy markets, the bond market also reflected growing investor caution. The yield on the 10-year U.S. Treasury note climbed 2 basis points to 4.75%, reaching its highest point since January 15, 2025. The 30-year Treasury yield rose 3 basis points to 5.243%.

The backdrop for rising yields includes comments made by Federal Reserve Chair Kevin Warsh on August 28 at the Fed's annual Jackson Hole symposium in Wyoming, where he flagged concerns about persistently elevated inflation. Following those remarks, the CME FedWatch tool — which tracks interest rate derivative pricing — indicated a 57.5% probability that the Fed will raise its benchmark funds rate by 25 basis points in September, pushing the target range to 3.75%–4%.

Higher yields can pressure equity valuations, particularly in rate-sensitive sectors like utilities and technology, which may help explain Monday's underperformance in those areas.

August Ended on a High Note

Despite Monday's pullback, context matters: U.S. markets wrapped up August in solidly positive territory following a mixed performance in June and July. The Dow finished August up more than 1%, extending its winning streak to five consecutive months and notching its 15th monthly gain in the past 16 months. The S&P 500 rose 2.6% in August, while the Nasdaq Composite surged 3.9% — both recording their first monthly advances since May.

Early in August, both the Dow and the S&P 500 set new all-time highs on both an intraday and closing basis, underscoring the underlying resilience in equities even as fresh headwinds now emerge.

What to Watch Going Forward

Investors will likely keep a close eye on any further developments in the U.S.-Iran situation, as additional escalation could push energy prices — and inflation concerns — even higher. The Fed's September meeting will be a critical focal point, with markets pricing in a meaningful chance of another rate hike. Whether inflationary pressures ease enough to give the Fed room to pause remains a key open question heading into the fall.