US 30-Year Yields Top 5.3% as Foreign Treasury Demand Falters

US long-dated Treasury yields climbed to their highest since 2007, with the 30-year topping 5.3 percent, as shrinking demand from Japan and Europe collided with a $40 trillion federal debt load.

The move is driven by demand, not supply — July net issuance of $355 billion was concentrated in short-dated bills, with long-term net issuance of $29.2 billion below the prior-year monthly average, according to analysis from Zhang Wei Economic Observer.

From June 29 to Aug. 21, the 10-year yield rose 36 basis points to 4.74 percent and the 30-year climbed 41 basis points to 5.27 percent, with inflation expectations contributing just 12 basis points. That contrasts with the February-May episode, when a 67 percent jump in West Texas Intermediate crude lifted the 10-year 70 basis points, 24 of them from inflation expectations. This time oil rose 25 percent while term premium drove the move, pointing to a supply-demand imbalance in long-dated debt.

The demand gap traces to the two largest foreign holders. Japan, whose policy rate has climbed to 1 percent from 0.1 percent since March 2024 as a wage-price spiral took hold, and Europe, facing stagflation, have less capacity to absorb US debt. With overseas investors holding $9.3 trillion of Treasuries, a sustained shortfall risks forcing the Federal Reserve to expand its balance sheet — a move that could reignite inflation and weaken the dollar.

Japan and Europe Can't Buy Like They Used To

Overseas investors hold $9.3 trillion of US Treasuries, or 23.6 percent of the total, with Europe at $3.1 trillion, Japan at $1.1 trillion and China at $600 billion. China's share has fallen to 7 percent from 23 percent at the end of 2011, a structural reduction driven by reserve diversification and geopolitical hedging. Japan's holdings have drifted lower as the Bank of Japan exited negative rates and yield-curve control, ending a decade in which its balance sheet absorbed government debt in lockstep with issuance.

Japan's wage-price spiral — the 2026 "shunto" spring wage round delivered a 5.01 percent average increase, a third straight year above 5 percent — has pushed the BOJ into a steady hiking cycle. The policy rate now stands at 1 percent after five increases since March 2024. Higher debt-service costs and a weaker yen have forced the central bank to spend reserves defending the currency, draining capacity to buy US debt. Europe faces a similar bind: energy-driven inflation and rigid welfare spending leave little room for overseas asset allocation.

Fed Expansion Is the Short-Term Fix

The Treasury has tried to ease the pressure, doubling its liquidity-support buyback operations for 10- to 30-year notes to at least $40 billion per operation. But the scale is small against $40 trillion of debt — 2026 buybacks total about $170 billion through Aug. 20, versus roughly $190 billion for all of 2025. Meanwhile, AI-related corporate issuance is crowding out Treasury buyers: five large technology firms have sold about $132 billion of debt this year, including a $53 billion tranche, with 2026 AI-linked issuance projected at $300 billion to $570 billion.

That leaves the Federal Reserve as the short-term buyer of last resort. Expanding its balance sheet would remove long-dated paper from private hands and repair the supply-demand balance, but markets would read it as deficit monetization, lifting inflation expectations and undermining dollar credibility. The last time the Fed leaned on balance-sheet expansion to absorb fiscal debt, in the pandemic era, it preceded a surge in inflation that forced an aggressive tightening cycle.

Before a technology-driven productivity boom rebuilds the tax base, the dollar is likely to stay weak, according to the analysis. If the AI investment narrative stumbles while energy and food prices climb, de-dollarization bets could return, favoring the yuan and gold — the yuan on relatively resilient industry and government debt, and gold on direct concern about sovereign currencies.

This article is for informational purposes only and does not constitute investment advice.