Major U.S. stock indexes experienced a significant decline on Thursday, September 10, 2026, mirroring a jump in oil prices and heightened inflation worries. The S&P 500 fell 0.6%, marking its fourth consecutive day of losses. The Dow Jones Industrial Average also dropped 0.6%, while the Nasdaq composite saw a 0.7% decrease.
This downturn coincided with Brent crude oil briefly surpassing $108 per barrel. The price increase was attributed to ongoing conflict with Iran, which continues to disrupt global crude oil supplies. The persistent instability in oil markets has contributed to a broader sense of economic uncertainty.
In the bond market, Treasury yields surged. The 10-year Treasury yield climbed to 4.95%, a nearly full percentage point increase since the conflict with Iran began. This rise in yields reflects increased investor concerns about inflation.
On Thursday, the S&P 500 closed down 44.66 points at 7,591.70. The Dow Jones Industrial Average lost 316.56 points, settling at 52,064.10. The Nasdaq composite decreased by 171.62 points, ending the day at 26,081.72. The Russell 2000 index, which tracks smaller companies, fell by 1%, or 30.29 points, to 2,890.95.
For the week ending September 10, 2026, the major indexes continued their downward trend. The S&P 500 was down 1.6%, the Dow Jones Industrial Average down 2.5%, the Nasdaq composite down 1.6%, and the Russell 2000 down 2.8%.
Despite the recent declines, the year-to-date performance for the indexes shows positive gains. As of Thursday, the S&P 500 remained up 10.9% for the year, the Dow Jones Industrial Average was up 8.3%, the Nasdaq composite had gained 12.2%, and the Russell 2000 showed a 16.5% increase.