UK Borrowing Costs Surge as Iran-US Ceasefire Collapses

The yield on benchmark 10-year gilts climbed seven basis points Tuesday morning, reflecting investor anxiety over renewed conflict. Brent crude prices surged more than nine per cent in a single session, their largest daily increase since May 2020, following a third successive night of strikes. Tensions intensified further after Donald Trump reinstated a blockade of Iranian vessels in the Strait of Hormuz and reports emerged that Iranian missiles struck two UAE tankers.

UK markets remain uniquely vulnerable due to the nation’s heavy reliance on imported energy and persistent underlying inflation. Traders are now pricing in a higher probability of Bank of England interest rate hikes, with two-year gilt yields climbing 10 basis points to cross the 4.5 per cent threshold. Daniel Mahoney of Handelsbanken noted that UK gilts have shown significant volatility, warning that yields could remain the highest among G7 nations as markets await the appointment of the new Chancellor. With analysts now expecting a full rate hike before year-end, Burnham faces a tightening fiscal environment immediately upon taking office.