Citigroup believes that the stock market gains driven by the artificial‑intelligence (AI) boom could persist for some time. “The AI bubble isn’t over yet” said Dirk Willer, Citigroup’s macroeconomics and asset‑allocation chief, to the “Handelsblatt Invest” podcast on Wednesday.

Willer, a long‑time Wall Street veteran who witnessed the dot‑com bubble in early 2000s New York, is convinced that this time will also see market over‑exuberance. “The more impressive the technology, the more people over‑invest” he told the interview.

Given the huge AI spendouts by major U.S. tech firms, it is understandable that investors will look to diversify. But they should keep in mind that, “if a tech bubble bursts, almost all assets will fall” Willer cautioned.