Fragile Mandates and Rising Yields

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