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Fortune
Fortune
Eleanor Pringle

Ken Griffin says America has been sent an ‘explicit warning’ from the bond market that it’s time to get the national debt in order

Ken Griffin, chief executive officer of Citadel Advisors LLC, at Bloomberg House during the World Economic Forum (WEF) in Davos, Switzerland, on Wednesday, Jan. 21, 2026. (Credit: Chris Ratcliffe—Bloomberg/Getty Images)

While it might appear that the most significant updates about the global economy are currently coming from a small town in the Swiss Alps, Tokyo may disagree. This week Japan’s bond market suffered a major selloff, with yields hitting an all-time high.

Ten-year yields spiked to 2.2%, while 30-year yields hit 3.66%. While the onset of the selloff can’t be pinpointed, it is likely a combination of geopolitical tensions and simmering concerns about Prime Minister Sanae Takaichi’s ¥21.3 trillion ($134 billion) economic plan to bolster Japan’s debt-heavy economy.

This, warned Citadel CEO Ken Griffin, should be a cautionary tale to the U.S., where yields neared the danger benchmark of 5% this week.

“I think there’s an explicit warning that if your fiscal house is not in order, the bond vigilantes can come out and retract their price,” Griffin said at a Bloomberg event in Davos.

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