ECB warns of likely AI stock correction

European Central Bank economists have issued a stark warning that a sharp correction in stock markets, particularly in the United States, is likely due to the artificial intelligence boom, regardless of whether the technology ultimately proves transformative. In a research note published on the ECB's website on August 17, 2026, staff economists argued that current market valuations are following the same pattern as past technology manias, such as the 19th-century railway boom, the 1920s electrification era, and the 1990s dotcom bubble. In each historical case, a boom driven by a genuinely transformative technology eventually gave way to a bust, and the economists contend the current AI rally is poised for a similar outcome.

The analysis, led by senior economists including Malin Andersson and Stefano Corradin, presents two scenarios that both lead to a market pullback. In the first, overconfident investors push prices far beyond what the technology can realistically support, leading to a crash when optimism fades. In the second, more unsettling scenario, even if AI successfully transforms the global economy and boosts corporate profits, stock prices could still fall as...