Governments in the Group of Seven are confronting an intensifying squeeze as debt levels that rose through a series of crises meet a fresh wave of market pressures. Pandemic-era and post-Ukraine policy moves that pushed interest rates sharply higher have been joined by new geopolitical risks that are stoking inflation concerns and nudging long-term borrowing costs still higher.
That combination is lifting the cost of servicing public debt and forcing fiscal managers to reassess how they borrow. With no clear end to recent geopolitical tensions, traders are pricing in further central bank rate action and investors are demanding larger returns for holding long-dated government bonds.
Where yields are moving
U.S. 30-year borrowing costs have climbed above 5 percent, touching a one-year high, while Japan's 10-year yields have reached levels not seen in three decades. Britain stands out among peers for paying particularly high rates; its 30-year yields rose to a 28-year peak last week amid political uncertainty.
These moves reflect both central bank tightening to tame inflation that surged after the COVID-19 pandemic and investor repricing of the risk associated with longer-term sovereign exposure. The latest geopolitical shock has only intensified those forces, translating into a steeper cost-of-capital environment for governments.
Shorter versus longer-term borrowing
The gap between short- and long-dated bond yields has widened sharply, making long-term borrowing relatively more expensive. Several factors are amplifying that shift: fiscal concerns that increase perceived sovereign risk, central banks' reduction of bond holdings, and a reallocation by major long-term investors such as insurers and pension funds, which have cut purchases in markets ranging from Japan to Britain.
In response, many governments have pivoted toward issuing more short-maturity debt to reduce exposure to elevated long-term rates. But that strategy carries its own risk - governments will need to refinance or repay that shorter-dated debt sooner, so any further rise in yields feeds more quickly into rising interest costs.
Debt levels and structural pressures
Across the G7, public debt is generally equal to or exceeds economic output, with the notable exception of Germany. Past global shocks - the 2008 financial crisis, the 2011-2012 euro zone debt crisis and the 2020 pandemic - all left debt ratios higher and weighed on growth.
Japan has the highest debt burden in the group, with debt exceeding twice its annual economic output. Germany, historically cautious about borrowing, has also been increasing its debt. Looking ahead, ageing populations, rising interest bills and additional spending pressures on defence and climate change are expected to push debt levels higher unless governments change policy paths.
Interest payments and fiscal impact
As governments refinance older, lower-cost debt into a higher-rate environment, interest payments are rising as a share of output in most G7 countries. While these payments remain below some historical peaks in many cases, the trend has been upward, and the United States has seen notable increases.
Across OECD countries, interest payments already exceeded defence spending in 2024, highlighting the fiscal weight of servicing public debt at current rates.
Rising term premiums and investor sentiment
The term premium on U.S. Treasuries - the extra compensation investors demand for holding long-term over short-term bonds - has increased since the pandemic. That rise reflects a range of concerns cited by market participants, including uncertainty about U.S. fiscal policy, reductions in the Federal Reserve's bond holdings, questions about central bank independence, and longer-term inflation uncertainty.
Importantly, this is not an exclusively U.S. issue: the term premium across major OECD countries has reached its highest level in over a decade, according to analyses that track investor compensation demands for long-run sovereign risk.
Shifts within the euro area
One debt metric that has shown improvement is the relative premium investors require to hold individual euro zone government bonds compared with Germany, which is still widely regarded as the region's safest borrower. The bloc has moved on from the acute strains of its earlier debt crisis, and cohesion after the pandemic, coupled with improved fiscal positions in some countries, has narrowed spreads.
Italy provides a notable example: once emblematic of euro zone sovereign stress, it has seen its debt risk premium fall to the lowest level since 2008 as European cooperation, political stability and a shrinking budget deficit helped restore investor confidence. By contrast, French bonds now carry greater perceived risk since a fractured political backdrop after the 2024 election has slowed efforts to rein in the budget deficit.
Japan under the microscope
Japan, the most indebted of the developed economies, has returned to the spotlight amid renewed fiscal concerns tied to Prime Minister Sanae Takaichi's spending plans. Market participants have been watching debt sales closely since a highly problematic long-term bond auction last May set off a bout of volatility in Japan's market.
That sale of a 20-year bond registered the lowest level of demand since 2012 and coincided with another investor sentiment measure hitting its second-worst reading since at least 1987. The fallout pushed long-term yields to record levels at the time. In response, Japanese authorities trimmed longer-dated bond sales to stabilise demand, but pressure has been mounting again - Japan's 10-year yields rose to their highest since 1996 on Monday.
Read across markets and policy
The recent trajectory of yields and risk premia matters for a broad range of sectors. Higher borrowing costs affect sovereign balance sheets directly but also have indirect implications for financial institutions, insurers and pension funds that are exposed to sovereign bond returns. Elevated yields can make capital more expensive for the private sector and influence investment decisions across industries sensitive to interest rates.
Policy choices - from the maturity profile of debt issuance to fiscal adjustments - will determine how quickly interest burdens grow and whether current pressures meaningfully constrain public spending and economic growth.