Lam Research (LRCX) Stock This Week: AI-Driven Semiconductor Rally Hits a Speed Bump — News, Forecasts, and Week-Ahead Setup (Updated Dec. 12, 2025)
Lam Research shares fell 4.85% to $160.52 on Friday, Dec. 12, ending a five-day rally and closing about 5.4% below the 52-week high reached two days earlier. The drop tracked a 5.1% decline in the Philadelphia semiconductor index as investors sold off tech stocks amid concerns over AI sector profits and rising Treasury yields.