This week’s closing may prove highly consequential for the period ahead. For the second time in just a few weeks, the U.S. Department of the Treasury has been forced to intervene—this time to stabilize mounting pressures on the credibility of America’s now-gigantic public and private debt burden.
A Pattern of Emergency Measures
The first intervention—unprecedented in decades—aimed to halt the yen’s sharp depreciation against the dollar, which threatened to trigger an unprecedented sell-off in U.S. Treasuries. Then-Treasury Secretary Janet Yellen reactivated and expanded the Foreign and International Monetary Authorities (FIMA) repo facility, allowing Japanese banks access to U.S. dollars without selling off their Treasury holdings.
Now, facing renewed stress, the Treasury announced it would begin repurchasing its own securities—a rare step—after traditional buyers demanded significantly higher yields to absorb new issuance. Yet even this measure proved insufficient. As with FIMA, officials confirmed the buyback program would not be a one-off but would continue ‘as needed’—a tacit acknowledgment of persistent market dysfunction.
Debt Dynamics Under Pressure
As some U.S. analysts pointed out, buying back debt with newly borrowed money is akin to ‘paying your loan with a credit card’—a vivid metaphor for the self-reinforcing debt spiral now gripping the U.S. financial system—and increasingly, global markets.
The scale is staggering: U.S. federal debt has surpassed $40 trillion for the first time, having ballooned by one-third in under five years. In July alone, the Treasury recorded a $432.3 billion monthly deficit—the largest since March 2021.
At the same time, corporate bond issuance has surged to record levels in 2024, already exceeding $1.7 trillion—an increase of roughly 27% year-on-year. Big Tech firms are borrowing heavily to fund AI research and data center expansion, adding further supply pressure to already saturated fixed-income markets.
Yields Surge Across the Board
The combined effect of massive public and private debt issuance—meeting investor skepticism about sustainability—has sent sovereign bond yields soaring. U.S. 30-year Treasury yields hit their highest level since 2007; French and German government bonds reached highs not seen since 2008 and 2011, respectively; UK gilts approached 6%; and Japanese JGBs touched historic highs.
Faced with this, central banks and governments have resorted—quietly and repeatedly—to their only currently available tool: issuing more debt to finance existing obligations, deficits, and new investments. There is no sign yet of a coordinated shift toward fiscal consolidation or structural reform.