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Citadel’s Ken Griffin warns AI is ‘almost certainly’ in a bubble

Reported by Hedgeweek ·Pluang ·Bloomingbit +4 more
Oct 21, 2026· 2 min read
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Key Takeaways
  • • Citadel founder Ken Griffin said artificial intelligence is "almost certainly" in a bubble, per a Bloomberg report, citing doubts over whether AI's heavy capital spending will generate sufficient returns.
  • • Griffin said "corporate America has been very uneven" in extracting value from its AI models, with businesses increasingly scrutinising spending on services from OpenAI and Anthropic.
  • • Griffin made the remarks at the Future of Global Markets Conference in New York on Tuesday, comparing the current AI boom with the dot-com era.
  • • The Wall Street Journal reported Anthropic is preparing a potential IPO and could spend $750bn on additional computing capacity in the coming years.
  • • Despite the bubble warning, Griffin remained optimistic, arguing that "any radical transformation of our economy is generally intertwined with a bubble" and forecasting a potential "golden era for entrepreneurs."
Summary
Citadel founder Ken Griffin has warned that artificial intelligence is "almost certainly" in a bubble, as investors question whether the technology's substantial capital requirements will deliver adequate returns, according to Bloomberg. Speaking at the Future of Global Markets Conference in New York on Tuesday, Griffin said companies have struggled to translate AI investment into measurable productivity gains, raising concerns about the sustainability of current valuations and spending commitments.

Griffin said corporate America has been "very uneven" in its ability to extract value from its AI models, adding that businesses are increasingly scrutinising their spending on services from OpenAI and Anthropic. His remarks come amid growing investor concern over the scale of AI infrastructure investment and the time required for spending on chips, data centres and computing capacity to generate profits.

The Wall Street Journal reported that Anthropic is preparing for a potential initial public offering and could spend $750bn on additional computing capacity in the coming years. Griffin said the company's long-term success would depend on demonstrating that its technology is essential across industries.

Despite his warning, Griffin remained optimistic about AI's economic potential, arguing that technological transformations have historically coincided with speculative bubbles. "Any radical transformation of our economy is generally intertwined with a bubble," he said. He compared the current boom with the dot-com era, noting that while speculative excess preceded the market crash, companies that emerged from the downturn went on to dominate their industries for decades.

Griffin also predicted that AI would accelerate the formation of new businesses while disrupting established companies and white-collar employment, describing the coming period as a potential "golden era for entrepreneurs."

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Sources

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