UK government borrowing costs have surged to their highest level since the global financial crisis, as investors react to rising energy prices, inflation fears and mounting fiscal pressures linked to the escalating conflict in the Middle East.
The yield on benchmark 10-year UK government bonds, known as gilts, briefly rose above 5 per cent on Friday, marking the first time it has crossed that threshold in 18 years. The sharp increase reflects a significant sell-off in sovereign debt, with prices falling as investors demand higher returns to compensate for perceived risks.
The move caps a turbulent week across global markets, with the UK seen as particularly exposed to the latest energy shock due to its reliance on imported gas and its recent track record on inflation.
At the same time, the pound weakened, slipping to around $1.33, while the FTSE 100 fell 1.44 per cent to close at its lowest level of the year. Since the start of hostilities in the Gulf, the index has lost nearly 1,000 points, equivalent to around 9 per cent, highlighting the scale of investor unease.
The surge in borrowing costs has been driven in large part by extreme volatility in energy markets. The price of Brent crude has climbed to nearly $110 a barrel, having spiked as high as $119 earlier in the week, and is now more than 55 per cent above pre-conflict levels.
Uncertainty over the reopening of key shipping routes, particularly the Strait of Hormuz, continues to cloud the outlook, with geopolitical tensions showing little sign of easing.
Higher energy costs are feeding directly into expectations of persistent inflation, prompting markets to reassess the likely path of interest rates. Traders now believe the Bank of England may be forced to raise rates by as much as one percentage point this year, a dramatic reversal from earlier expectations of rate cuts.
The rapid rise in gilt yields has drawn comparisons with previous periods of financial stress. The 10-year yield reached as high as 5.02 per cent during trading before closing just below that level, surpassing peaks seen during the market turmoil following the 2022 mini-budget.
Shorter-term borrowing costs have also risen sharply. The yield on two-year gilts jumped by 0.18 percentage points in a single day and has climbed by more than one percentage point over the past month, reflecting a rapid repricing of monetary policy expectations.
Market participants say the combination of rising energy prices, hawkish signals from the Bank of England and pressure on the government to provide cost-of-living support has created a perfect storm for the bond market.
While borrowing costs have increased globally, with bond yields rising in the US and across Europe, the UK is viewed as especially vulnerable to external shocks.
Economists point to the country’s dependence on imported energy and its sensitivity to global price movements as key risk factors. Chris Scicluna of Daiwa Securities said the current environment is hitting the UK at a particularly difficult moment, with inflation risks already elevated.
Matthew Amis of Aberdeen described the situation as a “blockbuster week” for the gilt market, noting that multiple pressures converged simultaneously to drive yields higher.
The volatility is not confined to the UK. European equity markets also fell sharply, with Germany’s DAX and France’s CAC both down close to 2 per cent. In the United States, the S&P 500 and Nasdaq declined amid reports of potential further military escalation in the region.
Even traditional safe-haven assets have shown unusual behaviour. Gold prices fell by around 2 per cent on the day and are down nearly 10 per cent over the week, as higher interest rates reduce the appeal of non-yielding assets.
Despite the scale of the market reaction, some analysts suggest the current shock may prove less severe than the energy crisis triggered by Russia’s invasion of Ukraine in 2022. However, the path ahead remains highly uncertain.
For the UK government, the rise in borrowing costs presents a significant challenge. Higher yields increase the cost of servicing debt at a time when public finances are already under pressure, limiting the scope for fiscal intervention.
For households and businesses, the implications are equally stark. Rising energy costs, higher interest rates and weaker financial markets are combining to create a more difficult economic environment, with the risk that volatility persists if geopolitical tensions continue.
In the near term, markets will be closely watching both developments in the Middle East and signals from central banks, as investors attempt to gauge whether the current surge in borrowing costs marks a temporary spike, or the start of a more sustained shift in the global financial landscape.
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UK borrowing costs hit highest level since 2008 as markets reel from energy shock