US stocks ended mixed on October 8, 2026, as surging oil prices revived inflation and interest-rate concerns and semiconductor shares led a technology selloff. The Nasdaq Composite fell 345.35 points, or 1.25%, to 27,193.34, while the S&P 500 lost 0.47% to 7,765.36 and the Dow Jones Industrial Average gained 0.10% to 51,231.64. The decline came two trading days after the Nasdaq reached a record close. Chipmakers, which had gained more than 80% this year, fell after a Financial Times report said OpenAI’s annualized revenue was $20 billion below a figure the company had previously signaled. OpenAI later said its annualized revenue run-rate was $50 billion. Front-month WTI and Brent crude settled 3.6% and 4.1% higher, respectively, after attacks on shipping in the Strait of Hormuz and a hurricane-related cut in US production. US crude has risen more than 60% this year during the Iran war, adding to inflation pressure. The Federal Reserve raised rates in September for the first time since July 2023, and markets priced in a 69.2% probability of a December hike, while Fed Governor Christopher Waller said further increases would probably be needed but that their timing was flexible.