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Story summary
- U.S. and European stocks hit record highs on April 22, 2026 as investors chased AI.
- European Central Bank economists warned in a Monday blog that the AI surge could trigger a correction as investors may be overoptimistic or prices could fall if AI valuations are accurate, citing past tech revolutions.
- The economists compared AI to past tech booms and warned that spreading adoption raises uncertainty and risk premiums that could depress stock prices.
