The United Kingdom's bond market, a powerful force capable of influencing government policy and even leadership, is presenting a significant challenge to Prime Minister Andy Burnham just ahead of his first critical budget.
Concerns over increased government spending and potential fiscal irresponsibility have driven the UK's borrowing costs to their highest levels since the 2008 financial crisis. Ten-year borrowing costs are nearing 5%, while 30-year yields have reached 5.8%, levels not seen in decades. This situation mirrors the market reaction that contributed to the downfall of former Prime Minister Liz Truss in September 2022, when her mini-budget triggered a sell-off in government bonds, known as gilts.
Investors, often dubbed 'bond vigilantes,' punish governments perceived as fiscally unsound by selling their bonds. This action drives down bond prices and pushes yields up, making it more expensive for governments to borrow money and potentially forcing a reassessment of economic policies.
The term 'bond vigilantes' was coined by economist Ed Yardeni in the 1980s to describe investors protesting inflationary Federal Reserve policies by selling U.S. Treasury bonds. The phenomenon re-emerged during Bill Clinton's presidency, notably in 1994, when soaring yields on U.S. ten-year Treasuries led to what was called the 'Great Bond Massacre.'
Despite Burnham's recent rhetoric about fiscal flexibility, the market remains unconvinced. Rising oil prices have fueled global inflation fears, further exacerbating concerns about the UK's economic trajectory. Some market observers, like Anthony Peters, argue that the market itself, rather than a specific group of investors, acts as the vigilante. He contends that market movements are driven by logical investor reactions to perceived negative economic outcomes, not by coordinated action.
The UK is currently borrowing at higher rates than several European countries, including Portugal, Italy, and Greece, and even Morocco. U.S. bond yields have also risen due to worries about America's budget deficit, prompting intervention from U.S. Treasury Secretary Scott Bessent with a bond buy-back program.
While current gilt yields are higher than during the Truss crisis, a similar level of panic has not yet materialized. Analysts suggest the market is in a holding pattern, awaiting clarity on the new government's fiscal plans in Chancellor John Healey's upcoming budget. The market has largely priced in potential negative outcomes, leading to a period of cautious observation.
Economists like George Cooper at Equitile Investments describe Britain as being in a 'fiscal trap,' where deteriorating public finances and a shrinking population raise concerns about the future ability to service national debt. The market is also increasingly wary of 'fiscal dominance,' a situation where central banks may tolerate higher inflation to prevent government insolvency.
The structure of the gilt market has also evolved. Domestic pension funds and insurers now hold only a third of gilts, with the Bank of England owning 18% and foreign investors and hedge funds controlling a significant portion. This shift in ownership can influence market dynamics.
To regain market confidence, Healey is expected to outline significant spending cuts and potentially a modest increase in income tax for middle earners in his budget. Some within Burnham's own party acknowledge the need for difficult decisions. Former economic adviser Jim O’Neill suggested reining in spending on programs like the pension triple lock and welfare system. Former Bank of England economist Andy Haldane has argued against further tax increases, stating the UK has reached a 'saturation point' where higher taxes could stifle growth.
Failure to convince the markets could have severe consequences, with analysts warning that policies like wealth taxes could further reduce tax revenue and prompt talent to leave the country. The overarching message for Burnham is that disregarding the bond market's concerns carries significant risk.