Even if you don't pay much attention to the stock market, chances are you've heard about Nvidia and its share price today. Catch up on why it matters.

Nvidia faces pressure from DeepSeek's impact on AI costs. Learn why NVDA stock’s high-margin business model may be vulnerable to these market shifts.

Nancy Pelosi sold Nvidia shares valued at millions right before their worth dropped sharply after the rise of Chinese AI company DeepSeek. On Monday, US semiconductor giant Nvidia saw its valuation fall by billions when investors discovered that the China-based start-up DeepSeek developed a competitor to ChatGPT for less than $6 million in just two months.