UK Borrowing Costs Soar to Multi-Decade Highs Amid Oil Price Surge

UK borrowing costs have reached multi-decade highs due to rising oil prices and increased bets on another interest rate hike by the Bank of England. The global bond selloff intensified after disruptions in Middle East shipping pushed oil above $105 a barrel, contributing to higher inflation and interest rates.

The impact was felt across the UK gilt market, with yields increasing sharply. The 10-year yield rose to its highest level since 2007, while 20- and 30-year yields hit levels last seen in the late 1990s. The biggest jump was in shorter maturities, which are most sensitive to central-bank expectations.

Markets now price a 97% chance of a November rate hike by the Bank of England, despite its recent signals suggesting it would only tighten again if inflation pressure re-accelerates. Higher yields also have implications for government auctions and next month's budget statement, as they raise the interest bill.

For households and businesses refinancing in the coming months, this may mean higher quoted fixed rates on loans tied to SONIA swaps. Mortgage lenders often base five-year fixed deals on these swap rates, which rose sharply following the gilt market's increase.