Why ASML Stock Is Falling Today

ASML shares slid Monday after leading AI executives urged slowing the development of the industry’s most advanced models. As of 2:29 p.m. ET on Sept. 14, 2026, ASML (NASDAQ: ASML) was down 6.2%, while the S&P 500 and Nasdaq Composite were down 0.3% and 0.2%, respectively. The pressure comes from Anthropic CEO Dario Amodei, who argued in an essay posted to X for embedded safety monitors and international limits, including agreements to reduce the overall pace of AI development. A slower buildout could reduce demand for ASML’s advanced semiconductor manufacturing equipment if data-center and training timelines stretch. The article also notes ASML was not among Motley Fool Stock Advisor’s “best stocks” list.