Bond Vigilantes Are Back: Why Global Yields Are Rising Again
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Article Type
Market Updates
Topics
Credit, Opinion
Published
August 20, 2026
Read time
5 mins
Authors
Luca Ferramosca, CFA
Jordy Hermanns, CFA
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Sovereign bond markets are taking center stage again. The return of the bond vigilantes is not simply a story about higher policy rates or another bout of inflation anxiety. It reflects a broader regime shift in which investors are once again demanding compensation for fiscal uncertainty, persistent supply, inflation risk and the credibility of policy frameworks.

 

The long end is where credibility is being tested: in the US, Europe and Japan, longer-dated yields have become the pressure point through which markets assess whether governments and central banks can maintain discipline in a world of elevated borrowing needs and less predictable inflation dynamics. While domestic drivers differ, the structural forces pushing yields higher are increasingly global in nature.

 

Recent developments

  • Real Yields: The recent spike in yields has been predominantly a real-yield move in the US, with real rates drifting higher, particularly at the long end, and the move was amplified by weaker or less well-received Treasury auctions.

  • Long end under pressure: The selloff has expressed itself mainly through the long end as term premia have risen, reflecting fiscal concerns, energy uncertainty, and ongoing capital demand tied to AI investment and buildout, rather than a meaningful repricing of the expected Fed policy path.

  • Short-end yields lower: Curve steepening has not been purely long-end led: weaker US macro data also pulled front-end yields lower, adding to the steepening move.

  • The Warsh effect: Term premia have also increased because Warsh has stepped back from forward guidance, leaving more price discovery to markets; this heightens data-point and event-driven volatility, which mechanically adds an additional volatility layer on top of existing fiscal-dominance and supply-related term premia. We also discussed the Warsh effect in this article.

  • Energy impact: While the Middle East conflict is far from resolved, US inflation expectations remain relatively well anchored, unlike in the UK and Europe where oil and distillate product prices have continued to grind higher, keeping energy-linked inflation risks more elevated. While oil prices have continued to trade with a premium, the actual tightness is evident in refined product crack spreads.

  • Spillover: Spillovers into other developed rates markets have been intense, with yields breaking out above the upper end of recent ranges, triggering momentum-driven investors and, combined with summer illiquidity, accelerating the selloff.
  • While AI buildout-related issuance is largely a US-specific story, valuations elsewhere remain highly sensitive to the US move, and front-end pricing dynamics outside the US remain relatively well behaved, which could raise inflation-credibility questions for the ECB and BOE if energy pressures persist.

 

The long end is where credibility is being tested

The most important signal in the current bond market selloff is not only the level of yields, but where the pressure is concentrated. Front-end rates still reflect expectations for central bank policy, but the long end increasingly reflects a broader credibility assessment. Investors are asking whether fiscal deficits, debt issuance, energy security, defence spending, industrial policy and AI-related capital demand can be financed without generating a permanently higher term premium. In that sense, the long end has become the market’s credibility meter: it is where concerns about fiscal discipline, inflation persistence and policy coordination are translated into prices.

 

Regional differences matter

  • United States: The US remains the epicenter of the global long-end repricing. Large fiscal deficits, heavy Treasury issuance, weaker auction demand and ongoing AI-related capital expenditure all add to duration supply. The key point is that the selloff has been driven more by real yields and term premia than by a meaningful repricing of the expected Fed policy path.

  • Europe: In Europe, higher long-term yields reflect a different mix of forces: persistent energy-linked inflation risks, higher defence and infrastructure spending, and the challenge of maintaining fiscal credibility while growth remains uneven. Eurozone sovereign spreads are still relatively contained, but that stability depends on confidence that fiscal slippage will remain manageable.

  • Japan: Japan’s yield levels remain low compared with other developed markets, but the direction of travel is important. As the Bank of Japan continues to move away from years of yield suppression, the market is rediscovering price sensitivity at the long end.

  • China: China is the main exception. Its bond market is diverging because inflation dynamics are weaker, growth momentum remains fragile, deposit rates are low, savings are high and domestic demand for safe assets remains strong. This divergence reinforces the point that the global yield story is not uniform: credibility is being tested most forcefully where fiscal expansion, inflation uncertainty and duration supply coincide.

 

Interesting observations

China’s bond market is diverging sharply from developed markets: Yields on Chinese government bonds continue to fall, diverging from the broader global developments. China is in a different (lower) inflation environment, and at the same time recent economic data disappointed.

 

Also, structural factors are supporting Chinese bonds, including low deposit rates, weak loan growth, high savings, and a shortage of bonds available in the market.

 

European spreads are low: Although the absolute level of yields have moved up across the Eurozone, the intra country spreads remain very tight and are well behaved.

 

Financial markets currently price eurozone government bonds as if credit risk is largely homogeneous, with sovereign spreads near cycle lows.

 

For example, Spanish 10y spreads over Germany are roughly stable around 40bps. This ties in with the strong economic developments in periphery countries like Spain and with the convergence of credit ratings across Eurozone countries.

 

France remains the most notable exception given its challenging fiscal backdrop and political uncertainty, as we elaborated on in this article.

 

A higher probability of a more Eurosceptic or fiscally expansionary government could challenge expectations around fiscal discipline and policy coordination within the EU. Given France's economic and political importance, even a modest change in investor sentiment could trigger wider OAT-Bund spreads and greater dispersion across euro-area bond markets.

Important information

Authors

Luca Ferramosca
Portfolio Manager
Luca Ferramosca, CFA, is a portfolio manager with a focus on European sovereigns and G10 rates.
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Jordy Hermanns, CFA
Portfolio Manager
Jordy Hermanns, CFA, is a portfolio manager in the multi-asset group and serves as an investment strategist in the asset allocation team. Jordy is responsible for strategic and tactical asset allocation decisions on the asset allocation team.  
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