AI Stocks Today: Nvidia, Micron, Oracle and Broadcom Lead the Action as OpenAI Funding Talk and Data-Center Debt Fears Shake Markets (Dec. 18, 2025)
U.S. stocks fell Wednesday, with AI-linked shares among the steepest decliners. Nvidia dropped 3.8%, Broadcom 4.5%, and Oracle 5.4%. Investors are weighing high capex and uncertain payback in AI infrastructure. Micron bucked the trend, rising after forecasting strong demand for high-bandwidth memory and raising 2026 capex to $20 billion.