AMD Stock After Hours (Dec. 17, 2025): Why Shares Slid to $198 and What to Watch Before Thursday’s Market Open
Advanced Micro Devices (NASDAQ: AMD) ended Wednesday, December 17, 2025, under pressure as the latest risk-off wave hit AI-linked tech and semiconductors. AMD closed around $198.20, down about 5.25%, after trading roughly between $211.48 (high) and $197.69 (low) during the session. Investing.com In after-hours trading, AMD was little changed shortly after the close—around $198.56 at 4:32 p.m. ET—as investors digested fresh chip-sector headlines and braced for a heavy U.S. economic-data slate on Thursday morning. MarketBeat Below is what moved AMD today, what’s developing after the bell, and what to know before the market opens on Thursday, December 18, 2025. What