More or less than $100 billion?

Question

January 2025: a Chinese lab gives away a model nearly as good as America's best, free for anyone to download, reportedly built for under $6 million. That Monday, America's biggest AI chipmaker's stock drops. How much value vanished in one day?

Accepted Answer

Almost $600 billion — the largest one-day loss of any company in stock market history. A free recipe did that. Whatever you believe about open weights, the market believes they're real. (55% of Americans answer "More" — floor est.)