Semiconductor Stocks Today: Nvidia, AMD and Broadcom Sink as AI Selloff Deepens—Micron Jumps After Hours (Dec. 17, 2025)
As of 6:00 p.m. ET on Wednesday, December 17, 2025, U.S.-listed semiconductor stocks have wrapped up a bruising regular session—then immediately pivoted into a very different after-hours story led by Micron Technology. The day’s defining theme was a renewed wave of “AI trade” de-risking that hit chipmakers, chip-equipment names, and data-center exposed semiconductor plays. In the background: fresh headlines around AI infrastructure financing, competitive pressure in AI chips, and policy and security scrutiny that investors are treating as real, near-term risk—not just narrative. AP News+1 US stock market close: semiconductors dragged the Nasdaq lower Wall Street extended its pullback for a fourth straight session. The S&P 500 fell 1.2% to