OpenAI Revenue Miss Triggers S&P 500 Decline of 0.49%

Following WSJ reporting that OpenAI's weekly users and revenue fell short of internal targets, the S&P 500 closed at 7,138.80 (−0.49%). Semiconductor stocks including Nvidia, AMD, and Broadcom declined sharply; 54.1% (3,011) of U.S. market issues fell. Concerns over AI infrastructure investment payback spread into broad risk aversion across the market.