UK 30-Year Gilt Yield Hits 28-Year High Amid Iran War and Political Jitters

AOL.com reported Tuesday that the UK gilt yield on 30-year government bonds has climbed to its highest point since 1998, compounding pressure on Chancellor Rachel Reeves and her already-strained fiscal rules.

Yields Surge as Two Crises Converge

The 30-year UK gilt yield peaked at approximately 5.78% on Tuesday. The 10-year yield simultaneously reached around 5.1%, an 18-year high. Both moves reflect a dual shock: the ongoing US-Israeli conflict with Iran, and mounting domestic political anxiety ahead of local and national elections on Thursday.

Traders told AOL.com that Britain’s bond market has sold off more sharply than those of other G7 peers. They attributed the gap to the UK’s greater vulnerability to inflation, alongside fresh speculation over a possible Labour Party leadership challenge over the weekend.

Strait of Hormuz Disruption Drives Global Bond Selloff

The Iran conflict has effectively shut the Strait of Hormuz, squeezing global oil and liquefied natural gas supplies. Energy prices have spiked sharply as a result. Bond investors across major economies have responded by pricing in sustained inflation and higher borrowing costs, triggering broad-based selling across government debt markets.

Over the weekend, traders moved to extend that repricing, reflecting expectations that the Hormuz blockage will prove prolonged rather than temporary.

Background: Reeves’ Fiscal Rules Already Under Strain

The Chancellor entered this period with limited headroom. UK annual government borrowing fell to £132 billion in the year to March, a three-year low. Analysts, however, warn that renewed inflationary pressure from energy markets could push that figure higher through the year.

Reeves operates under two core budget rules: not borrowing to fund day-to-day spending by parliament’s end, and ensuring debt falls as a share of national income over the same horizon. Rising gilt yields directly inflate the government’s debt interest bill, tightening the squeeze on both commitments.

Bank of England Plays Down UK-Specific Risk

Bank of England Governor Andrew Bailey pushed back on the most alarming readings of the gilt move in a BBC interview last week. He pointed to sterling’s relative stability as evidence that markets are not singling out the UK for punishment. Bailey noted that the pound has been trading near the upper end of its post-Brexit range, a signal he uses to assess whether a uniquely British story is driving volatility. He attributed most of the market movement to conflict-related developments and commentary rather than any domestic fiscal breakdown.

For now, investors are watching events in the Gulf and at British ballot boxes simultaneously, leaving UK government debt in a precarious position heading into the rest of the week.

Read Next: Fed Holds Rates Steady as Inflation Uncertainty Persists