James Latham Investor Digest

UK Long-Term Borrowing Costs at 28-Year High

UK Long-Term Borrowing Costs at 28-Year High

Key Questions

What is causing UK long-term borrowing costs to reach 28-year highs?

The ongoing Iran conflict is driving UK gilt yields to their highest levels in 28 years. This has increased pressure on government spending and may slow the recovery in construction activity.

How have US mortgage rates been affected by recent bond market turmoil?

US mortgage rates have surged to 6.51% due to the same global bond market pressures affecting UK gilts. Related articles note these rates have climbed to their highest level in 9 months.

What additional risks could further impact global rates and supply chains?

The potential closure of the Strait of Hormuz poses threats to energy supplies and global supply chains. Federal Reserve signals of possible further rate hikes are compounding these global rate pressures.

Iran conflict drives UK gilt yields to 28-year highs, pressuring government spending and potentially slowing construction recovery. US mortgage rates also surged to 6.51% due to same bond turmoil. Strait of Hormuz closure risk adds to energy and supply chain threats. Fed signals possible rate hikes further compound global rate pressures.

Sources (2)
Updated May 26, 2026