tech and semiconductor stocks tumbled worldwide after Anthropic CEO Dario Amodei, OpenAI CEO Sam Altman, and Elon Musk publicly urged slowing the rapid development of frontier AI models over safety risks including loss of control, cyber threats, and potential economic damage; the warnings sparked sharp declines in Nvidia and other chipmakers while some software and cloud names showed resilience, alongside separate updates including Apple’s iOS 27 rollout featuring enhanced Siri AI and Microsoft’s new internal AI code of conduct emphasizing human control.
- Anthropic: CEO Dario Amodei published a weekend essay calling on the industry to “pace the frontier” and slow capability advances; the company also indicated it would not pursue an IPO this year and offered to embed outside safety evaluators.
- OpenAI: CEO Sam Altman publicly agreed with Amodei’s call, stated OpenAI would match the evaluator commitment, and indicated the company likely would not go public in 2026 due to safety concerns.
- Nvidia: Shares fell several percent in the selloff as investors worried a slower AI development pace could reduce demand for AI chips.
- Amazon / Amazon Web Services (AWS): Shares declined amid the broader AI-related pressure on cloud and infrastructure spending expectations.
- Microsoft: Shares held up better or rose in some sessions; the company released a draft code of conduct requiring its AI models to remain under human control and preventing resistance to oversight or shutdown.
- Alphabet (Google) / DeepMind: Shares rose modestly in the rotation; DeepMind CEO Demis Hassabis backed the pacing call.
- SpaceX: Shares declined as Elon Musk endorsed the slowdown proposal.
- Apple: Released iOS 27 (along with related OS updates), positioning the long-awaited Siri AI overhaul as a centerpiece feature.
- SoftBank: Shares plunged more than 10% in Asian trading as a major OpenAI backer.
- TSMC: Shares declined with the broader semiconductor sector.
- AMD: Shares fell several percent in the chip selloff.
- Intel: Shares dropped more than 5% amid AI infrastructure concerns.
- Broadcom: Shares declined with other semiconductor names.
- ASML: Shares fell sharply in Europe as part of the equipment and chipmaker retreat.
- Meta Platforms: Shares rose as investors rotated toward certain software and platform names.
- Infineon Technologies: Shares declined with European tech and semiconductor peers.
