Meta Platforms and most other U.S. stocks are rising Thursday following a rush of profit reports from some of the country’s most influential companies, but drops for Nvidia and Microsoft are keeping the market in check.

Chinese startup DeepSeek published a research paper in which it claimed to have trained a large language model rivaling the performance of leading U.S. models, while spending much less money than U.S.

Technology stocks were rocked to their core Monday after claims made by a Chinese start-up threatened to upend the existing artificial intelligence (AI) paradigm.