UK 30-Year Borrowing Costs Hit 28-Year High Amid Iran War, Election Uncertainty
Long-term UK government borrowing costs have reached their highest point since 1998, with the yield on 30-year bonds peaking at approximately 5.78% on Tuesday. This rise is attributed to the continuing conflict involving the US-Israeli axis and Iran, alongside heightened political uncertainty in the UK preceding upcoming local and national elections.
Government bond markets across major economies have seen declines since the commencement of the US-Israeli conflict with Iran, which has effectively closed the Strait of Hormuz. This closure has disrupted global oil and liquid natural gas supplies, leading to a sharp increase in energy prices. Markets have responded by anticipating higher inflation and borrowing costs, creating volatility in global bond markets.
However, the impact on UK markets has been more pronounced than in other G7 countries. Traders attribute this to the UK's economy being more susceptible to inflation, compounded in recent days by the prospect of increased political instability surrounding a series of elections. The Labour Party is expected to face significant losses in council seats and challenging national contests in Scotland and Wales. Recent days have also seen widespread speculation regarding potential leadership challenges within the government.
The government points to an improvement in growth, inflation, and borrowing figures earlier this year, prior to the escalation of the conflict in Iran. Rising yields on government bonds directly translate to higher debt interest costs for the Treasury, straining Chancellor Rachel Reeves' capacity to adhere to her budget rules, particularly commitments to avoid borrowing for day-to-day spending and to reduce government debt as a share of national income.
While UK government borrowing fell to a three-year low of £132 billion for the year to March, analysts anticipate a worsening outlook if inflation accelerates. The Debt Management Office (DMO) has adjusted its strategy for government debt sales, reducing reliance on 30-year bonds, which are primarily bought by defined benefit pension funds. Bank of England Governor Andrew Bailey recently downplayed concerns regarding the gilt market, citing the pound's strong value and characterising market movements as largely driven by the conflict in the Gulf rather than specific UK economic fundamentals. Nevertheless, markets remain attentive to both international developments and domestic electoral outcomes.
