The U.S. stock market closed lower on Monday, August 31, 2026, with all three major indices posting declines. The S&P 500 fell 25.62 points (-0.33%), the Nasdaq Composite dropped 31.54 points (-0.12%), and the Dow Jones Industrial Average declined 374.09 points (-0.70%). The selloff was broad, with no single sector driving the move. The market's tone was mixed, with risk-off sentiment prevailing after the U.S. conducted airstrikes on Iran. However, the broader market context remained risk-on, with stocks on track for a winning month. Oil prices surged above $90 per barrel, and 30-year Treasury yields hit 5.25%, reflecting heightened geopolitical tensions and concerns about inflation. The market was also influenced by a warning from Federal Reserve Chairman Kevin Warsh, who highlighted a new challenge for investors heading into September.

The headlines highlighted the market's sensitivity to geopolitical developments, with several articles noting the impact of the U.S.-Iran strikes on stock prices. Oil stocks, including Pacific Gas & Electric (PG&E), were under pressure, while Aon Corporation flashed a sell signal. Tesla, Nvidia, SLB, and Pinterest were among the stocks that explained today's market moves. The market was also influenced by a gap-down start for the Nifty, with investors advised to be cautious heading into September. The mixed tone reflected the market's reaction to both the geopolitical risks and the broader economic outlook, with investors balancing concerns about inflation and interest rates with the potential for further market gains