OpenAI backer SoftBank falls as much as 13% after tech leaders call for slowdown of development

SoftBank shares dropped over 13% after Anthropic's Dario Amodei and OpenAI's Sam Altman called for slower AI development, clouding the OpenAI IPO

SoftBank Group plunges 13% after OpenAI says IPO will not come this year

Asian shares are mixed and U.S. futures have edged lower