In a matter of days, DeepSeek proved to be so popular as to climb to the top of Apple's App Store, surpassing OpenAI's ChatGPT as the most downloaded app. But for owners of Nvidia stock, and stock traders in general, DeepSeek is on track of becoming a black swan — an unexpected event with extreme consequences.

One name that most people outside China likely didn’t know before Monday has sent shockwaves across the tech industry, pushing some of the sector’s leading stocks down. The co