When does debt become unsustainable?
The game is up, or certainly becomes more difficult, for countries that lose markets’ confidence. Policymakers across major economies have increasingly turned to fiscal stimulus, delivering the most significant fiscal easing since 2010, if we exclude the extraordinary measures surrounding the COVID pandemic. The key takeaway is that less economic integration and more activist fiscal policy will not only put structural upward pressure on long-term bond yields but also lead to more compressed and more volatile cycles. We expect the theme of divergence across countries and regions to become even more pronounced heading into 2026.
US
The Trump administration’s trade policy agenda will likely remain a considerable source of uncertainty for global investors, especially as we approach the mid-term elections later in the year. The front end of the US curve will probably reflect an ongoing dovish policy tilt as the Fed will be under renewed pressure to continue its rate-cutting cycle, despite further fiscal expansion through the One Big Beautiful Bill Act. While labor demand has clearly softened, the administration’s immigration policy has reduced supply, leading us to think that the labor market is weaker but will likely hold up in 2026. We note warning signs in some pockets of the credit markets but, absent a major exogenous shock, we do not anticipate a recession, meaning inflation pressures will remain elevated, especially if productivity gains do not materialize. In this scenario, yields could trend higher, particularly at the back end of the curve.
Europe
We expect continued differentiation across countries. Persistent political turbulence in France has not only cost the country its AA rating but also made it vulnerable to global investors’ concerns over fiscal sustainability and political fragmentation. Without credible fiscal consolidation or a surge in productivity growth, countries that combine high debt levels, large deficits, and elevated interest costs relative to trend growth with heavy reliance on foreign financing are increasingly susceptible to a sudden loss of market confidence. This is likely to drive elevated term premia and nominal yields. It also translates into curve steepening and widening spreads relative to countries deemed fiscally responsible. Among the key beneficiaries of the increased emphasis on fiscal rectitude is the Netherlands, which is emerging as a new risk-free benchmark for the euro area as Germany shifts toward more expansionary fiscal policy. Erstwhile crisis-stricken Greece, Spain, and Portugal are also enjoying increased investor confidence in their fiscal trajectories.
UK
The UK has long been identified as a bellwether for global investors’ tolerance of countries with high debt levels and an unclear path toward debt consolidation. It also faces a particular challenge from persistent inflation, with a wide distribution of possible outcomes, including renewed economic growth on the one hand and the tail risk of stagflation on the other. Unless inflation is brought down by tighter demand- or supply-side policies, we expect UK rates to remain persistently higher than those of its European counterparts.
Japan
While the domestic inflation dynamics and strong nominal growth should imply the Bank of Japan has the go-ahead to keep hiking policy rates, it will likely remain on hold until it has more visibility on fiscal policy. Our structural view is for higher front-end yields and a stronger JPY, but this theme will only play out if uncertainty clears.
The shifting shapes of yield curves
Since the lows of 2023, term premia have increased across multiple markets as yield curves normalize and investors demand more compensation for holding longer-dated bonds, as illustrated in Figure 2.