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No comparisons between today’s market and the Roaring 20s; you can’t slow down AI – Bill Ackman

Reported by Tradingview
Nov 3, 2026· 2 min read
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Key Takeaways
  • • Bill Ackman, CEO of Pershing Square, rejected comparisons between current market conditions and the 'roaring twenties' that preceded the Great Depression, arguing stock valuations remain supported by fundamentals.
  • • Ackman told CNBC that earnings expectations have risen meaningfully this year and that market multiples are 'actually reasonably low relative to the growth inherent in the market.'
  • • Ackman identified bubble-like activity in private venture markets, citing 'FOMO' in the private venture space, though he said 'a lot of it is justified.'
  • • Ackman framed AI development as a national security imperative, calling the global race for superintelligence 'existential to the U.S.' and saying political opposition is unlikely to meaningfully slow it.
  • • Ackman flagged 'fluff' in one-day options, high leverage, and sports betting, while expressing skepticism of polls and prediction markets and expecting the House to flip in the midterms.
Summary
Bill Ackman, CEO of Pershing Square, pushed back against comparisons between today's market and the 'roaring twenties' that preceded the Great Depression, according to an interview with CNBC. He argued that stock valuations remain supported by fundamentals, stating that earnings expectations have risen meaningfully this year and that market multiples are reasonably low relative to the growth inherent in the market.

While dismissing concerns about bubble-like activity in public markets, Ackman acknowledged froth in private venture investing. He pointed to FOMO in the private venture space, saying there is some bubble-like activity but that much of it is justified.

On AI, Ackman rejected calls for a pause in development amid growing political pushback. He described the technology as a global race for superintelligence in which the U.S. cannot afford to finish second, calling that outcome existential. He dismissed the idea that political opposition to AI data centers would significantly slow development, noting that many states would welcome the job creation, and compared attempts to slow AI to trying to slow the adoption of electricity in America. He acknowledged that political rhetoric around AI could help some candidates in the midterms but said, 'practically speaking, we can't slow down' the country's AI efforts.

Ackman identified areas of concern outside traditional equities, citing one-day options, high levels of leverage, and large sums wagered on sports outcomes, which he described as containing 'fluff.' He also expressed skepticism about both polls and prediction markets and offered his expectation that the House would flip in the upcoming midterm elections.

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Sources

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Tradingview No comparisons between today’s market and the Roaring 20s; you can’t slow down AI – Bill Ackman