The Global Bond Sell-Off Is a Repricing of Fiscal Risk

Long-term government bonds are being repriced across the United States, Europe and Japan because investors are demanding more compensation for fiscal deficits, rising debt issuance, inflation uncertainty and political risk. The move has been amplified by higher energy prices and stronger competition for long-duration capital from corporate borrowers, including companies financing data centers and other AI infrastructure. 18202128

The result is a synchronized rise in long-term yields rather than a sell-off confined to one country. U.S. 30-year Treasury yields briefly reached about 5.34%, their highest level since 2007. Japan’s 10-year yield approached 3%, while German and French long-dated yields reached their highest levels in years. 182021

Why long-term yields are rising

Bond prices and yields move in opposite directions. When investors sell existing bonds, their prices fall and their yields rise. New government debt must then be issued at higher rates, increasing the cost of refinancing maturing obligations and funding new deficits.

Several forces are reinforcing one another:

• Large structural deficits mean governments must keep supplying bonds to the market.
• Higher inflation risk reduces the appeal of fixed payments, so investors seek a larger nominal yield.
• Persistent policy rates make it harder for central banks to offset a long-term fiscal repricing with rapid rate cuts.
• Energy shocks can raise inflation expectations while weakening household purchasing power and growth—a difficult combination for both bond markets and central banks. 2021
• Corporate borrowing, including debt used to finance data centers, chips, power and networking, adds competition for long-term savings. That does not establish AI borrowing as the cause of the sell-off, but it can add pressure to term premiums and corporate financing costs when sovereign issuance is already high. 28

This is why the move matters beyond government bond portfolios. Higher long-term yields can raise mortgage rates, corporate borrowing costs, commercial-property financing costs and bank lending standards. The effects usually reach households and businesses with a lag, discouraging home purchases, refinancing and investment.

The U.S. debt feedback loop

The United States crossed the $40 trillion gross federal debt threshold in August. Treasury data cited by Reuters put total public debt outstanding at $40.047 trillion, including debt held by the public and intragovernmental holdings. 49

The more immediate pressure is the cost of servicing that debt. Net interest outlays reached about $963 billion during the first 10 months of fiscal 2026, while full-year interest costs are expected to exceed $1 trillion. 515761

That creates a potential feedback loop:

1. Persistent primary deficits require additional bond issuance.
2. Greater supply, inflation uncertainty and fiscal concerns push yields higher.
3. Higher yields increase the government’s interest bill as debt is refinanced.
4. A larger interest bill widens future deficits unless spending or revenues change.
5. Larger deficits require still more borrowing.

This is a fiscal sustainability risk, not proof of an imminent U.S. default. The outcome depends on nominal economic growth, inflation, tax revenues, the maturity of government debt and whether policymakers can establish a credible path toward stabilizing primary deficits. The Congressional Budget Office outlook summarized by the Committee for a Responsible Federal Budget projects federal interest costs rising from $970 billion in 2025 to $2.1 trillion by 2036 if current law remains broadly unchanged. 63

The practical consequence is a narrowing of fiscal room. As interest consumes more revenue, governments have less flexibility to respond to a recession, fund infrastructure or defense, or expand social programs without additional borrowing or difficult policy choices.

Why France has become Europe’s clearest sovereign-risk test

France faces both the higher common interest-rate level in Europe and a country-specific risk premium. The spread between French 10-year bonds and German 10-year Bunds has reached roughly 83 basis points, a sign that investors demand additional compensation for French fiscal and political uncertainty. 167

France’s budget disputes are unfolding against political fragmentation and the approach of the 2027 presidential election. Reuters reported that another increase in the deficit could bring France closer to U.S.-style deficit levels, while separate reporting described an increasingly difficult budget battle as parties position themselves ahead of the election. 12

A wider OAT–Bund spread does not by itself mean that France is in a euro-area debt crisis. It does, however, raise the cost of French financing and can become self-reinforcing: higher yields increase interest expenses, which make deficit reduction harder, while political uncertainty can encourage investors to demand an even larger premium.

The European Central Bank can help limit disorderly market fragmentation, but a central-bank backstop cannot permanently replace fiscal credibility. 12

Treasury buybacks can improve liquidity—but not solve the deficit

The U.S. Treasury increased buybacks of longer-dated nominal coupon securities to at least $4 billion per operation. Such measures can improve market functioning and temporarily support liquidity after a sharp sell-off. 19

Their limits are important. Buybacks do not eliminate the need to finance structural deficits, reduce the government’s underlying interest burden or remove the term premium investors demand for inflation and fiscal risk. Liquidity support can reduce disorder; it cannot substitute for credible fiscal adjustment.

Could Japan add pressure to U.S. Treasuries?

Japan is the largest foreign holder of U.S. Treasuries, with more than $1.1 trillion in holdings. That creates a potential transmission channel between Japanese markets, currency policy and U.S. borrowing costs. If Japanese authorities sold Treasuries to support the yen, or if Japanese institutions shifted funds home as domestic yields became more attractive, demand for Treasuries could weaken and place additional upward pressure on U.S. yields. 333437

That is a tail risk rather than an automatic trigger for a Treasury crisis. A rapid, large-scale sale would reduce the value of Japan’s remaining portfolio and could push U.S. yields higher in a way that also harms Japan. A senior Japanese Finance Ministry official has indicated that using Treasuries for currency intervention could be counterproductive. 36

Even without wholesale liquidation, reduced Japanese demand could matter at the margin. Japan’s rate normalization and higher domestic yields weaken one long-standing source of demand for overseas, long-duration bonds, according to TD Economics. 3947

Why equities and AI projects are vulnerable

Long-term bond yields are also a benchmark for valuing equities. Higher real and nominal yields reduce the present value of earnings expected far in the future. That makes long-duration growth companies—especially businesses whose valuations depend on rapid future expansion—more sensitive to bond-market moves than companies generating cash flow today.

AI-related companies face a second pressure: financing. Data centers, computing equipment, electricity capacity and networking require substantial capital. If debt becomes more expensive, projects dependent on cheap external financing may be delayed, resized or subjected to higher return requirements. Corporate spreads can also widen as investors reassess leverage and refinancing risk.

The transmission to stocks is not theoretical. Reuters reported that the global bond sell-off rattled equity markets as long-term yields climbed to multi-decade highs. 1721

The growth trade-off

Higher yields can reflect stronger nominal growth, but the current repricing is also tied to deficits, inflation and geopolitical energy risk. That combination is more damaging than a purely growth-driven rise in rates.

For households, higher mortgage rates can reduce affordability and discourage purchases. For companies, higher bond and swap rates raise the hurdle rate for investment and refinancing. For governments, rising interest costs compete with spending on public services and investment. Over time, those channels can slow hiring, construction and business expansion.

The policy challenge is especially acute when inflation remains elevated. Cutting rates may support growth but risk reviving inflation expectations; keeping policy restrictive can contain inflation but intensify the pressure from debt service and weak investment.

What would bring long-term rates down?

A durable improvement would require more than a temporary liquidity operation. Markets would need evidence of some combination of:

• lower and more stable inflation expectations;
• credible medium-term paths for primary deficits;
• debt stabilization relative to economic growth;
• manageable refinancing needs; and
• less political uncertainty around budgets and fiscal rules.

Until those conditions improve, long-term yields are likely to function as a market-based signal of fiscal discipline. The central message of the sell-off is not that every government faces imminent default. It is that investors are less willing to treat persistent deficits, inflation risk and heavy issuance as costless—especially when governments and fast-growing corporations are competing for the same pool of long-duration capital.