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'Grow the damn economy': Billionaire Ken Griffin warns Trump made a mistake cutting taxes as the national debt tops past $40tn

Reported by Opalesque ·Fortune
Oct 21, 2026· 2 min read
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Key Takeaways
  • • Citadel founder Ken Griffin, speaking at Citadel's Future of Global Markets Conference in New York, said Washington "didn't have the fiscal space to renew the tax cuts" in President Trump's One Big Beautiful Bill Act.
  • • The Congressional Budget Office estimates the law will add $4.1 trillion to US deficits over 2025-2034.
  • • Griffin urged policymakers to "grow the damn economy" as total US national debt tops $40 trillion, according to Fortune's coverage of the remarks.
  • • The comments put a prominent hedge fund manager on record questioning the fiscal trajectory of the 2025 tax legislation.
Summary
Citadel founder and CEO Ken Griffin criticized the tax-cut strategy underpinning President Donald Trump's One Big Beautiful Bill Act, saying Washington lacked the fiscal capacity to extend the cuts. Speaking at Citadel's Future of Global Markets Conference in New York, Griffin argued that the priority should be economic growth rather than further fiscal stimulus through tax policy, summarizing his position with the phrase "grow the damn economy," as reported by Fortune.

The Congressional Budget Office estimates the legislation will add $4.1 trillion to federal deficits over the 2025-2034 period. Griffin's remarks came as total US national debt surpassed $40 trillion, a level that frames the fiscal constraints he described. The source material available for this story is limited, and the broader policy debate and any official responses from the administration are not detailed in the reporting reviewed here.

For institutional investors, the remarks highlight a view from one of the largest hedge fund managers that the current fiscal path may limit future policy flexibility. Allocators tracking US deficit trajectories, Treasury supply, and the durability of tax-driven growth assumptions may weigh such commentary alongside CBO projections.

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Sources

2 outlets

AlphaMaven summarised this story from the reporting below. Each link opens the original article.

Opalesque 'Grow the damn economy': Billionaire Ken Griffin warns Trump made a mistake cutting taxes as the national debt tops past $40tn Fortune ‘Grow the damn economy’: Billionaire Ken Griffin warns Trump made a mistake cutting taxes as the national debt tops past $40 trillion