UK Borrowing Costs Surge to 25-Year High Amid Political Turmoil

The Lead: Political Crisis Triggers Market Reaction

Long-term UK borrowing costs have soared to the highest level in nearly three decades while the pound and stocks fell, as investors braced for a potential change of leadership with cabinet ministers urging Keir Starmer to quit. The crisis comes at a critical time for the UK economy, with markets reacting to political uncertainty and concerns over fiscal policy.

The Political Crisis: Starmer's Leadership Under Threat

Prime Minister Keir Starmer is consulting colleagues before a crunch cabinet meeting on Tuesday morning that comes after ministerial aides quit and more than 70 MPs publicly called for him to go. With investors worried over chaos and potential changes to the fiscal rigour of Starmer's government, the political uncertainty has directly impacted financial markets.

The Bond Market Surge: Borrowing Costs at 25-Year High

The yield on 30-year government bonds jumped 11 basis points to 5.794%, the highest since May 1998. The benchmark 10-year yield on UK government bonds (known as gilts) also rose 11 basis points to 5.11%, just below the highest levels since 2008 it hit in March amid fears that the Iran war will stoke inflation. These increases reflect growing concerns about the UK's long-term economic stability.

Market Reactions: Pound and Stocks Under Pressure

The pound dropped 0.5% to $1.354 and was 0.3% lower against the euro, at 86.8p a euro. Stocks were also under pressure, with the FTSE 100 index down nearly 1%. Banks fell significantly, with Barclays dropping 4% in early trade, while Natwest and Lloyds slipped more than 3%. The market reaction indicates deep concerns about the direction of UK economic policy.

Investor Concerns: Fiscal Policy and Inflation Fears

Investors are concerned that, if Starmer is forced out of Downing Street, his possible replacements may seek to increase public spending and loosen the government's fiscal rules. Two potential frontrunners to succeed him, Angela Rayner and Andy Burnham, have hinted that they would like to see higher public spending. Neil Wilson, an investor strategist at Saxo Markets, noted: "Markets tend to dislike a lack of certainty over who runs a government; the fiscal position is already fragile and likely to become worse should a left-leaning ticket prioritise spending; and that this makes inflation stickier."

Future Outlook: Political Uncertainty to Continue

Mohit Kumar, the chief economist for Europe at Jefferies, said: "A managed exit would be our base case scenario. Any replacement would likely be left leaning and be negative for the long end of the curve and the currency." He added he expected a widening between shorter- and longer-dated UK borrowing costs, and was betting against the pound. With oil prices also rising due to concerns about the Iran conflict, the UK economy faces multiple headwinds in the coming months.