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AI bubble watch

A handful of AI companies now carry most of the US stock market. Every warning, selloff and record quarter in one place.

Live updates

  1. Wall Street closed lower to end a rocky week and an analyst published a rare sell call on Nvidia, naming concentration as the risk.

  2. A worked-numbers explainer showed 7 AI-linked companies now hold more than a third of the S&P 500, a bigger share than the 1973 or 2000 peaks.