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Andrea Beltratti, Alessia Bezzecchi
AI, the market, and the value of possible worlds
The high valuations of AI stocks are fueling debate over a possible new technology bubble. A few figures explain why. In 2026, Nvidia surpassed a market capitalization of $5 trillion, while the U.S. semiconductor sector posted gains of more than 100% over the past year. The U.S. market is trading at multiples that are very high by historical standards: the S&P 500’s Shiller P/E has risen above 40, ...