How is the Economy of the United Kingdom Reacting to Bond Market Volatility?
The Geopolitical Impact on Gilt Markets
The UK Government bond (Gilts) market has in recent times performed well below that of their peers, with analysts advising that this is due to the current US/Iran/Israel war currently engulfing the Middle East and the UK’s dependence on imported energy. The near zero exports of crude oil and its offshoots such as jet fuel via the currently blockaded Strait of Hormuz, has pushed up petrol and diesel prices and other forms of energy with the result that inflation is now appearing on the horizon.
Investor Sentiment and Historic Yield Milestones
Before the current war kicked off on the 28th of February this year, experts advised that the UK government bond market was particularly popular with investors. These investors have now turned their back on gilts by dumping bonds and moving their investment elsewhere. The gilt market has been more turbulent than their counterparts in the United States and Europe, and volatility has remained even after the ceasefire came into effect on 8th April 2026.
The UK bond market has endured the most unstable period since the credibility crisis of the Liz Truss conservative government’s mini-budget announcement on the 22nd September 2022. The UK bond market seems especially susceptible to geopolitical news, government finances and potential inflation. In fact, on the 10th of March this year, yields on the 10-year gilt (UK borrowing costs benchmark) topped the 5.00% mark for the first time since the Global Financial Crisis in 2008.
Fiscal Targets and the Mortgage Crisis
Sadly for the current government of the UK, as investors sell gilts, the yield on government bonds goes up increasing the amount the government owes, therefore making it harder for them to meet their fiscal targets. Experts suggest that the UK economy is hurting, due in part to the volatility in the bond market as banks have put up interest rates for homebuyers, with some mortgage products being removed from the market. Indeed, recent data released shows that the availability of mortgage products has hit an all-time low in March of this year, and with 1.8 million mortgages expiring in 2026, homeowners are going to find it harder to find a deal to suit their pockets.
The Role of Swap Rates in Lending Instability
Mortgage lenders in the United Kingdom use swap rates to set their lending rates. The swap market* is used by trading rooms to bet on where the Bank of England will set interest rates at their next policy meeting. If the swap rates are madly fluctuating, then accurately pricing loans by mortgage brokers and other lenders becomes so much harder, especially as they will be locking in the loans for many years to come. Analysts advise that due to volatility in the swaps market, bets on interest rates have been changing rapidly on a daily basis, hence the withdrawal by lenders of many products from the market.
*Swap market – The swap market acts as a premier barometer for interest rates because it aggregates the market collective, forward-looking expectations of future central bank policy, (in this case the Bank of England), inflation and economic growth into tradeable fixed-rate instruments. Unlike bond yields which can vary due to outside influences such as the current geopolitical unrest, swap rates primarily reflect the anticipated path of overnight funding rates over the medium to long-term. If swap rates rise, it signals that financial markets expect higher inflation or tighter central bank policy in the future.
Corporate Bond Market Contraction
On the corporate front, bond issues have declined and data confirms that only three sterling corporate bonds totalling circa £1.6 billion were issued between 1st March and mid-April this year, as compared to an average of circa £4.5 billion over the same period year-on-year since 2014. Corporate bonds are usually priced using UK government bonds as a benchmark, and increased yield is usually added on top, reflecting the risk for investors when buying from a corporation instead of the government. Higher yields on gilts will reflect increased borrowing costs for the corporation, which may well have resulted in the recent downturn in corporate bond issues.
Economic Spillover and Downgraded Growth Forecasts
Bond and swap volatility have spilled over into the UK economy. Analysts suggest that swap rate volatility can hurt confidence in the UK housing market, and mortgage deals that have been withdrawn results in less demand and fewer property sales, resulting in a negative effect on the building of new homes. Experts say that the current volatility has also undermined Chancellor Rachael Reeve’s current efforts to increase growth in the economy. Indeed, the IMF (International Monetary Fund) has recently downgraded its growth forecast for the UK, largely due to the US/Iran/Israel conflict. The IMF suggested that the economy would only grow by 0.80% in 2026, down from their original forecast of 1.30%, adding that they expect the unemployment rate to increase from 4.9% in 2025 to 5.60% this year.
