The bond market delivered a stark verdict on the new government's fiscal plans today, with the yield on the 10-year gilt surging above 4.5% for the first time since the 2008 financial crisis. Investors are voting with their feet, and the message is clear: unfunded tax cuts are a luxury this economy cannot afford.
The trigger was the Chancellor's mini-Budget, which announced £45 billion in tax cuts without corresponding spending reductions. The market's reaction was swift and brutal. Sterling tumbled to a 37-year low against the dollar, while the FTSE 250 shed 2% as capital flight gathered pace.
This is not just a technical adjustment. It is a crisis of confidence. International investors, who hold roughly a quarter of UK government debt, are demanding a risk premium for holding British assets. The cost of borrowing for the government is rising, and that will ultimately be paid for by taxpayers.
The Bank of England is now in a bind. Inflation is still running at nearly 10%, well above its 2% target. Raising interest rates to support the currency would deepen the recession; doing nothing risks importing inflation via a weaker pound. The central bank's credibility is on the line.
Meanwhile, the government's rhetoric about 'supply-side reform' rings hollow without details. Cutting taxes on bankers' bonuses while energy bills soar is a political gift to the opposition. The bond vigilantes are not fooled by vague promises of deregulation.
The irony is that the Treasury's own fiscal rules were designed to prevent exactly this scenario. By borrowing to fund day-to-day spending, the Chancellor has broken the first rule of fiscal responsibility. Markets hate surprises, and this was a nasty one.
What happens next? If the government sticks to its guns, expect further gilt volatility and a weaker pound. Mortgage rates will rise, compounding the cost-of-living crisis. Alternatively, a humiliating U-turn could steady nerves, but at the cost of political capital. Either way, the bill for this gamble will come due.
For investors, the calculus is simple. UK assets now carry a risk premium that reflects policy uncertainty. Until credible fiscal plans are presented, capital will continue to seek safer havens. The bottom line: the party is over, and the hangover has begun.
