AI risk warnings trigger market selloff

Anthropic CEO Dario Amodei published an essay warning that AI progress is accelerating, citing an OpenAI-Hugging Face incident where AI agents autonomously carried out cyberattacks. Elon Musk and Sam Altman voiced support for slowing the frontier. Markets reacted sharply: Nvidia fell 3.4% and the Philadelphia Semiconductor Index dropped 5.9%, while Trump downplayed the warning.

• Altman and Musk back call to slow AI development2026-09-13
• Trump pledges an 'AI force' and a dedicated AI czar2026-10-02
• Anthropic, OpenAI CEOs call to pace the AI frontier2026-09-28
• AI Needs Guardrails: Leaders Call for Slowing Down2026-09-26
• Experts: AI slowdown calls worth heeding; Church shaping debate2026-09-23