UK long-term borrowing costs have surged to their highest levels in nearly three decades, driven by investor concerns over a possible shift in Labour leadership. The yield on 30-year government bonds, which reflects the interest rate, climbed by 11 basis points on Tuesday morning, reaching 5.794%. This marks the highest level since May 1998. However, the yields eased slightly after Prime Minister Keir Starmer reassured cabinet ministers of his commitment to remain in office, despite recent political challenges.
Investor anxiety centered on potential changes to Labour’s fiscal policies should there be a leadership change. Ahead of a critical cabinet meeting, Miatta Fahnbulleh, a senior minister, resigned, calling for Starmer’s resignation following Labour’s poor performance in the recent local and devolved elections. Despite the turmoil, Starmer addressed colleagues, emphasizing that the Labour party’s formal process for initiating a leadership challenge had not been activated. He stated, “The country expects us to get on with governing. That is what I am doing and what we must do as a cabinet.”
Support for Starmer within the cabinet appeared to stabilize the situation. Key figures, including Business Secretary Peter Kyle, Technology Secretary Liz Kendall, and Housing Secretary Steve Reed, publicly backed the Prime Minister. Their solidarity provided a degree of assurance to financial markets, which had been unsettled by the earlier political uncertainty.
Following these developments, the financial markets showed signs of calming. The benchmark 10-year yield on UK government bonds decreased to below 5.1% after peaking at 5.13% earlier in the day. Similarly, the 30-year yield retreated to 5.76%, down from a new 28-year high of 5.81%. The support for Starmer and his reaffirmation of leadership contributed to this partial reversal in borrowing costs, reflecting a cautious optimism among investors about the stability of UK fiscal policy.