<h1>DeepSeek's AI Model Announcement Spurs Tech Stock Declines, S&P 500 Drops 1.5%, Nvidia Falls Nearly 17.</h1> Tech stocks experienced significant declines as a Chinese company, DeepSeek, announced a large language model capable of competing with major US firms at potentially lower costs. This development led to a 1.5% drop in the S&P 500, with notable losses in Big Tech stocks, including a nearly 17% decrease for Nvidia. The Nasdaq composite fell by 3.1%, while utilities linked to AI data centers also suffered. However, stocks outside AI-related sectors remained stable, with the Dow Jones Industrial Average rising by 0.7%.