DeepSeek topped the Apple App Store chart and sparked fears the Chinese company was quickly catching up with OpenAI's ChatGPT while costing far less.

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.

Instead, it comes from what appears to be an Nvidia consumer, Chinese AI service provider DeepSeek. It works well, jumping to number-one in Apple’s U.S. App store, but the issue is less the performance and more the training behind it.