U.S. stocks fell on Tuesday as a deepening global bond sell-off and rising oil prices pushed borrowing costs higher. The market decline marked a volatile start to September amid escalating Middle East hostilities and surging investor bets on upcoming Federal Reserve interest rate hikes.
Dow Jones Industrial Average and Major Indexes Close Lower
Wall Street kicked off the historically weakest month for equities under heavy pressure, with all major U.S. indexes closing lower as global sovereign debt yields climbed to multi-year highs.
Fresh U.S. attacks on Iranian targets added to geopolitical strife, and equities kicked off what is historically the weakest month of the year alongside fewer-than-expected U.S. job openings in July from the JOLTS report. The Dow Jones Industrial Average fell 448 points, or 0.8%, as of 3:01 p.m. Eastern time, while the S&P 500 index fell 0.8% and the Nasdaq composite fell 1.1%. The Dow traded at 52,895.96 as of 9:32 a.m. Eastern time, down roughly 0.58% from Monday’s close of 53,185.99, according to Yahoo Finance.
Escalating Conflict in the Middle East and Spiking Oil Prices
Strait of Hormuz Tanker Attacks and Brent Crude Price Surge
Renewed military hostilities around the Strait of Hormuz drove energy markets higher, compounding inflation worries across trading desks. Two oil tankers—one Saudi-owned and one South Korean-owned—were struck by projectiles Monday night as the United States and Iran resumed hostilities in the Strait of Hormuz, extending a six-month war that has largely settled into what analysts have described as a stalemate. Daniela Hathorn, senior market analyst at Capital.com, characterized the mood on trading desks as investors weighed multiple sources of uncertainty simultaneously, stating that markets are starting September cautiously while balancing renewed geopolitical uncertainty, elevated bond yields, and the latest U.S. economic data.
Brent crude rose 4.6% and U.S. oil closed above $90 for the first time in more than a month as another round of U.S. military strikes on Iran sent oil prices higher, stoking worries about stubbornly high inflation and deepening a bond market sell-off.
Following Kevin Warsh's hawkish comments on Friday, we have strikes in Iran and oil is higher,
said Ross Mayfield, investment strategy analyst at Baird in Louisville, Kentucky, referring to the Federal Reserve chair. It is the perfect cocktail for a risk-off day in a market that is trading near all-time highs.
Bond Yields Climb as Markets Re-price Federal Reserve Rate Hikes
U.S. Treasury Yields Reach 19-Month Highs Amid Sovereign Debt Sell-off
The combination of sticky inflation pressures from energy costs and mounting government debt fueled a persistent sell-off across global sovereign debt. The benchmark U.S. Treasury yield continued to edge higher after reaching a 19-month high on Monday. The yield on the 10-year Treasury, which tends to impact mortgage rates, rose to 4.80% from 4.75% late Monday, and was as low as 4.20% at the beginning of 2026.
Fixed-income turbulence translated directly into rising borrowing costs for businesses and consumers alike. The same worries continue to hang over Wall Street, including anxiety over rising prices, government debt, and the impact of global conflicts on the U.S. and the global economy. Global sovereign debt yields rose to multi-year highs as markets increased their bets that central banks will need to hasten their interest rate hikes, and a sharp increase in rate-hike bets soured sentiment in recent sessions while renewed clashes in the Middle East heightened worries that borrowing costs may need to rise to contain price pressures.
Yields may not spike into crisis territory, but the low-rate era is unlikely to return soon,
wrote Richard de Chazal, macro analyst at William Blair, adding that the balance of risks still points to yields remaining elevated.
Technology Equities Lead Market Decline Amid Seasonal Headwinds
Growth-oriented technology shares absorbed some of the heaviest selling pressure as Big Tech stocks like Nvidia and Amazon were the heaviest weights dragging the market lower, alongside Microsoft falling 1.3% and Advanced Micro Devices falling 3.3%. Their big market values tend to give them more influence over the broader market’s direction, and their growth amid the artificial-intelligence boom has been heavily reliant on borrowing, which becomes more expensive as interest rates rise.
Market strategists pointed out that the downturn aligns with historical calendar trends. September is the only month with a negative average return since 1926, and since then the benchmark S&P 500 has lost 0.7% on average, making it the weakest month for stocks, according to Fisher Investments, which cited data from Finaeon. Still, historical trends may not be a reason to step away from stocks, said Anthony Saglimbene, chief market strategist. We’re nearing the fall, and the problem with the fall is you have very few earnings reports,
said Jay Hatfield, portfolio manager at InfraCap in New York, noting that the weak start to September follows a shaky but mostly positive month for Wall Street where every major index notched monthly gains in August. Futures on the S&P 500 and Nasdaq-100 fell heading into the session, dropping about 0.6% and 1.4% respectively.
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