China has imposed a ban on its major technology companies from purchasing Nvidia's artificial intelligence chips, impacting the company's stock performance. During Wednesday’s pre-market trading, Nvidia's shares declined nearly 1.5 percent as investors reacted to the news. This move reflects intensified global tech regulation and supply chain concerns. The video provides details about the ban, its implications for Nvidia, and the broader effects on the tech sector, highlighting recent market reactions and industry trends.