AI Stocks Today (Dec. 18, 2025): Nvidia, Microsoft, Broadcom and Micron Rebound as Inflation Cools and OpenAI’s Mega-Round Talk Raises the Stakes
Updated: Dec. 18, 2025 (4:15 PM EST) AI stocks ended Thursday with a sharp rebound after a bruising stretch that revived “AI bubble” fears across semiconductors and mega-cap tech. The day’s tone shift was driven by two things investors care about most right now: a cooler-than-expected inflation update (supportive for growth-stock valuations) and a blockbuster outlook from Micron that reinforced a simple message—AI infrastructure spending is still accelerating, and the supply chain is still tight. TradingView+2Reuters+2 By the close, Wall Street’s tech-heavy leadership reasserted itself. The S&P 500 rose 0.78% to 6,773.91, the Nasdaq Composite gained 1.37% to 23,004.92, and