Monday's tech rout has brought no shortage of big numbers on Wall Street, and here's another to keep in mind: $441.9 billion. That's the amount of market capitalization that Nvidia has shed, based on intraday activity.

DeepSeek, a Chinese AI startup, became the talk of the proverbial AI town when it released its R1 model on Friday. R1’s functionality and accuracy compared to its U.S. counterparts, despite using fewer resources and less compute power,