US Stock Market Today: S&P 500, Nasdaq fall on AI bubble concerns, Broadcom tumbles 8.4%, Oracle slips 2.3% 12 December 2025 by batamimarathi.com At 9:47 a.m. ET, the Dow Jones Industrial Average rose 0.31%, the S&P 500 lost 0.18%, the Nasdaq Composite fell 0.51%