UK government borrowing costs have risen to their highest level since the global financial crisis, as investors react to rising energy prices, fears of inflation and rising financial pressures linked to escalating conflicts in the Middle East.
The yield on 10-year UK government bonds, known as gilts, briefly rose above 5 percent on Friday, marking the first time it has crossed that threshold in 18 years. The sharp rise reflects a significant sell-off in senior debt, with prices falling as investors seek higher returns to offset perceived risk.
The move caps a turbulent week for global markets, with the UK seen as particularly vulnerable to the latest energy shock due to its reliance on imported gas and its recent history of inflation.
At the same time, the pound weakened, falling to around $1.33, while the FTSE 100 fell 1.44 percent 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 9 percent, highlighting the level of investor unease.
The increase in borrowing costs has been largely driven by extreme volatility in energy markets. The price of Brent crude rose to around $110 a barrel, having peaked at $119 earlier in the week, and is now more than 55 percent above pre-conflict levels.
Uncertainty over the reopening of major shipping lanes, particularly the Strait of Hormuz, continues to cloud the outlook, with political tensions showing little sign of abating.
Higher energy costs feed directly into expectations of continued inflation, prompting markets to reassess the likely path of interest rates. Traders now believe the Bank of England could be forced to raise rates by as much as one percentage point this year, a dramatic reversal from earlier expectations of a rate cut.
The rapid rise in gilt yields compared to previous periods of financial distress. The 10-year yield hit as high as 5.02 percent during trading before closing below that level, surpassing peaks seen during market turmoil following the 2022 budget.
Short-term borrowing costs have also risen sharply. The yield on two-year gilts jumped 0.18 percent in one day and is up more than one percentage point over the past month, reflecting a quick repricing of monetary policy expectations.
Market participants say a 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 risen globally, with bond yields rising in the US and across Europe, the UK is seen as particularly 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 situation is hitting the UK at a very difficult time, with inflation risks already high.
Matthew Amis of Aberdeen described the situation as a “blockbuster week” for the gilt market, noting that many pressures came together to drive yields higher.
Flexibility is not limited to the UK. European equity markets also fell sharply, with Germany’s DAX and France’s CAC both down around 2 percent. In the United States, the S&P 500 and Nasdaq declined amid reports of a possible military escalation in the region.
Even traditional safe haven materials have shown unusual behavior. Gold prices fell nearly 2 percent on the day and fell nearly 10 percent during the week, as higher interest rates reduced the attractiveness of non-yielding assets.
Despite the magnitude of the market reaction, some analysts suggest that the current shock may prove to be smaller than the energy crisis caused by Russia’s invasion of Ukraine in 2022. However, the path ahead remains highly uncertain.
For the UK government, rising borrowing costs present a major challenge. Higher yields raise debt servicing costs at a time when public finances are already under pressure, limiting the scope for fiscal intervention.
For homes and businesses, the results are equally clear. Rising energy costs, high interest rates and weak financial markets combine to create a very difficult economic environment, with the risk that instability continues if political tensions persist.
In the near future, the markets will be watching developments in the Middle East and signals from central banks, as investors try to gauge whether the current increase in borrowing costs indicates a temporary increase, or the beginning of a stable change in the global financial situation.
