The emergence of China-based AI app DeepSeek sent shares plummeting on Monday for many U.S. tech giants, including chipmaker Nvidia and AI-backer Microsoft. Nvidia, which helped catapult market wide gains in recent years,

A major disruption hit the artificial intelligence sector this week as DeepSeek, a China-based chatbot, unveiled its latest AI models—trained for just $6 million. That’s a fraction of the cost U.S. companies typically spend,