Fragile Mandates and Rising Yields
Kristian Kerr | Head of Macro Strategy
Last Updated: September 11, 2025
A key theme dominating global financial markets in recent weeks has been the general upward pressure on sovereign bond yields, particularly at the long end of government bond market curves. This move reflects a complex interplay of macroeconomic factors, but increasingly, political instability is emerging as a driver — most notably in Japan and France, where recent leadership shakeups have introduced fresh uncertainty into the policy outlook and fiscal trajectory.
In Japan, the political landscape was rattled over the weekend when Prime Minister Shigeru Ishiba announced his resignation. His departure has triggered a leadership contest within the ruling Liberal Democratic Party (LDP), with internal elections anticipated to take place on October 4. However, the implications extend beyond party politics. The incoming LDP leader will need to secure a majority in the lower house of the Japanese Diet to form a stable government. The new prime minister would then need to either form a broad coalition or call snap elections. The LDP is generally considered the more long-term rates-friendly party by the markets, so failure to form a government could usher in a period of heightened political uncertainty, undermining investor confidence and amplifying volatility in Japanese government bonds. The Bank of Japan, already navigating a complex policy environment with inflation at the highest levels in the developed world, could also be forced into a bit of a holding pattern until greater political certainty is achieved.
Political Uncertainty Could Increase Bond Market Volatility
Source: LPL Research, Bloomberg, 09/10/25
Disclosure: Past performance is no guarantee of future results.
Meanwhile, in France, political tensions have also escalated. On Monday, François Bayrou lost a critical vote of no confidence and stepped down as prime minister after his government’s proposed austerity budget failed to gain sufficient support in the National Assembly. French President Emmanuel Macron has since appointed Defense Minister Sebastien Lecornu to become the new prime minister. This new appointment avoids snap elections, but it remains to be seen whether the incoming leader will be able to form a viable coalition capable of governing effectively. Odds in the betting markets of new elections before the end of the year are still around 35%.
The stakes are high. France is grappling with a €3 trillion debt burden, and the cost of servicing that debt amid higher interest rates. Under European Union (EU) rules, they need to reduce their deficit to 4.6% by 2026. Political fragmentation and policy paralysis could severely hinder efforts to implement credible fiscal consolidation. Should markets begin to perceive that political dysfunction is impeding necessary reforms, the risk of a sovereign credit rating downgrade becomes very real — potentially exacerbating the sell-off in French government bonds and further spread widening.
Higher Rates Mean Higher Stakes for the French Government
Source: LPL Research, Bloomberg 09/10/25
Disclosure: Past performance is no guarantee of future results.
Conclusion
Taken together, these developments underscore how political risk is once again becoming a key driver of market dynamics. Investors are increasingly demanding higher term premiums to hold long-dated government debt in jurisdictions where political uncertainty threatens to derail fiscal discipline and economic stability. While inflation dynamics and central bank policy remain important, the recent move higher in yields in Japan and France underscores the budding influence of governance risk in shaping global fixed income markets.
The LPL Research Strategic and Tactical Asset Allocation Committee (STAAC) holds a neutral weight in core bonds, with a slight preference for mortgage-backed securities (MBS) over investment-grade corporates. The Committee believes the risk-reward for core bond sectors (U.S. Treasury, agency MBS, investment-grade corporates) is more attractive than plus sectors. The Committee does not believe adding duration (interest rate sensitivity) at current levels is attractive and remains neutral relative to benchmarks.