Tech stocks fell worldwide after senior AI executives warned of runaway frontier AI development. Executives at Nvidia, Alphabet, Meta, Samsung, SK Hynix, TSMC, SoftBank, ASML and Infineon saw premarket declines, with the Nasdaq futures down nearly 2 %. Anthropic CEO Dario Amodei published a blog urging a pause and third‑party evaluators to verify safety, a stance endorsed by Elon Musk, Sam Altman and Demis Hassabis. SpaceX, OpenAI and Anthropic all saw share drops, while White House NEC director Kevin Hassett called the plan sensible. President Trump warned against a slowdown that could aid China, noting the geopolitical stakes. Amodei also called for curbs on chip sales to China and tighter data‑harvesting rules, aiming to widen the U.S. lead in AI over the next 3‑5 years.

The rare unity among tech leaders highlights growing concerns that rapid AI advances could outpace safety measures, prompting market reactions and policy debates.