UK Gilt Yields Surge as Starmer Leadership Crisis Rattles Bond Markets
BBC Business reported Tuesday that UK gilt yields surged to levels not seen in decades, as political turmoil surrounding Prime Minister Sir Keir Starmer rattled bond investors and sent the pound lower.
Yields Climb Toward Financial Crisis Territory
The 10-year gilt yield climbed to 5.13% on Tuesday. That approaches levels last registered during the 2008 global financial crisis. Meanwhile, the 30-year yield hit 5.80%, a figure not seen since 1998. Short-dated two and five-year gilts also moved higher. Those shorter maturities feed directly into fixed-rate mortgage pricing for households.
The FTSE 100 fell 0.5%, with bank shares leading declines. Investors worried a new administration might impose fresh levies on the financial sector. Sterling dropped 0.5% against the dollar to $1.35.
Political Pressure Mounts on the Prime Minister
More than 75 Labour MPs have publicly called for Starmer to step down. The calls followed a bruising set of local and national election results last week. Starmer told cabinet colleagues to “get on with governing” and noted the formal party leadership challenge process had not been activated. Several senior ministers voiced support for him to remain.
Markets, however, are pricing in meaningful leadership change risk. Analysts at Capital Economics warned that UK borrowing costs would rise further and sterling would weaken under a new Labour leader. They argued the frontrunners, including Andy Burnham, Angela Rayner, and Wes Streeting, would each likely expand public spending compared with the current administration.
Background: A Bond Market Already Under Pressure
UK gilt yields had been climbing before Tuesday’s session. The Iran conflict has pushed oil prices above $100 per barrel and stoked inflation fears globally. That backdrop has made bond investors across all major markets more nervous about holding long-dated government debt.
The UK’s position was already more fragile than peers. Debt interest payments now consume roughly one pound in every ten the government spends. Overseas buyers account for between 25% and 30% of gilt purchases, making sentiment among international investors especially important.
Anna Macdonald, investment strategy director at Hargreaves Lansdown, told BBC Business that elevated oil prices layered additional inflationary pressure onto a market already anxious about potential fiscal loosening. She noted that any shift away from current borrowing rules could force those overseas holders to demand a higher risk premium.
Reeves Rules Hold — For Now
Chancellor Rachel Reeves and Starmer have repeatedly pledged strict borrowing discipline. Capital Economics cautioned that the UK’s fragile fiscal position means investors will react sharply to any hint of rule relaxation. The so-called iron-clad fiscal framework has been central to the government’s market credibility since taking office.
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