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UK long-term borrowing costs pass 6% as global bond sell-off intensifies

Thirty-year gilt yield hits 28-year high ahead of autumn budget, driven by US deficit fears and persistent oil prices

By LineZotpaper
Published
Updated
Read Time2 min
Sources4 outlets
The global bond sell-off has intensified, pushing UK long-term borrowing costs above 6% for the first time since 1998, as fears that the US deficit is reaching unsustainable levels combine with persistently high oil prices to spook investors.

The yield on 30-year UK government bonds, known as gilts, rose past the 6% mark on Thursday, reaching a 28-year high. The move deepens a sell-off that had already pushed the 10-year gilt yield to 5.38% on September 24, approaching a 19-year high set the previous week.

Investors are concerned that the persistently high cost of oil could reignite inflation, forcing central banks to raise interest rates in the coming months to prevent price increases from becoming embedded. These worries are compounded by fears that US borrowing costs are unsustainable, a factor that is driving the broader global sell-off.

The rising cost of government borrowing puts fresh pressure on Chancellor John Healey ahead of a tough budget next month. Higher yields increase the upfront cost of government investment and limit the chancellor's room for manoeuvre. The development follows warnings from international bodies about rising debt and borrowing risks, and a claim by Greater Manchester Mayor Andy Burnham that the UK is 'in hock' to bond markets.

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Analysis

Why This Matters

  • Higher UK borrowing costs directly increase the expense of government investment, limiting the Chancellor's ability to fund public services or infrastructure ahead of the autumn budget.
  • The sell-off signals broader global financial unease: fears over US fiscal sustainability and persistent oil-driven inflation could lead to higher interest rates worldwide, affecting mortgage rates and business borrowing costs.
  • If the trend continues, it could trigger a self-reinforcing cycle where rising yields raise debt servicing costs, further pressuring government finances and potentially prompting austerity measures.

Background

Global bond markets have been under pressure for weeks, driven by a combination of factors. A strong US economy has kept inflation expectations elevated, while large fiscal deficits in both the US and UK have raised concerns about the sustainability of government debt. The UK is particularly exposed as it approaches its autumn budget, with investors demanding higher compensation for holding long-term government debt. The 10-year gilt yield had already risen to 5.38% by late September, and the 30-year yield has now broken through the 6% barrier for the first time in nearly three decades.

Key Perspectives

The UK Treasury/Chancellor: Facing a difficult budget with higher borrowing costs that reduce fiscal headroom. The Chancellor must balance investment commitments against the risk of spooking markets further. Bond investors: Demanding higher yields as compensation for inflation risk and fiscal uncertainty. Their selling pressure reflects a belief that both UK and US debt levels are unsustainable. Critics/Skeptics: Some argue that the sell-off may be overdone if inflation proves transitory, and that long-term borrowing costs remain low by historical standards when adjusted for expected inflation. Others warn that central banks may be forced to raise rates, crushing economic growth.

What to Watch

  • The 10-year gilt yield: whether it breaks above the 19-year high as the sell-off broadens.
  • Oil prices: a continued rise could amplify inflation fears and deepen the bond rout.
  • The UK autumn budget: any signals of fiscal discipline or increased borrowing will be closely watched by markets.

Sources

Zotpaper

Written by software from the reporting listed above, scored by an automated standards desk, and published without a person reading it first. If something here is wrong, tell the editor and it will be put right.

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