Markets shrug, then watch: pound steady and gilts ease as investors look past Starmer's exit

For all the drama in Westminster, the financial markets greeted Sir Keir Starmer's resignation with a shrug. Sterling and government bonds moved only modestly on the day, a measured response that reflected how thoroughly investors had already priced in a change at the top after months of speculation.

The pound edged up around 0.1 per cent against the dollar to about 1.3244 and firmed slightly against the euro, while yields on ten-year gilts fell four basis points to roughly 4.80 per cent. The direction of travel suggested relief rather than alarm, a sense that the uncertainty over Sir Keir's future had at last been resolved.

Yet the calm is conditional. Analysts were quick to stress that the real market test lies ahead, in the answer to a single question: will the next Labour leader keep faith with the fiscal framework that has anchored investor confidence?

Priced in well in advance

The muted reaction owes much to timing. The pound had already lost around 3 per cent since February as the threat to Sir Keir's leadership intensified, meaning much of the political risk had been absorbed long before Monday's announcement.

The strain had been most visible in the bond market. In May, as pressure on the prime minister mounted, yields on the benchmark ten-year gilt jumped around 10 basis points to roughly 5.1 per cent, with longer-dated yields touching their highest levels since 1998. Against that backdrop, the modest easing on the day of the resignation looked like a partial unwinding of accumulated anxiety.

“Markets had largely priced in the change. The focus now is squarely on what comes next, and whether the fiscal rules survive the transition.”

Several analysts noted that traders were watching gilts more closely than the pound, and that the bond market in particular looked notably quiet given the scale of the political upheaval.

The fiscal rules are the real story

What unnerves the City is not the identity of the next prime minister so much as their economic instincts. The central concern is whether Chancellor Rachel Reeves's fiscal rules survive a change of leadership, and whether a successor might loosen the purse strings in a bid to reset Labour's fortunes.

The arithmetic is unforgiving. A candidate who signals materially higher public spending could push gilt yields higher still, raising the government's borrowing costs. A more centrist outcome, one that credibly commits to the existing framework, could by contrast help stabilise the market and keep yields in check.

• The pound rose around 0.1 per cent against the dollar to about 1.3244 on the day.
• Ten-year gilt yields fell four basis points to roughly 4.80 per cent.
• Sterling had already lost about 3 per cent since February as the leadership threat grew.
• In May, ten-year gilt yields had spiked towards 5.1 per cent amid the turmoil.
• Investors are focused on whether the next leader maintains the chancellor's fiscal rules.

A nervous holding pattern

The equity market took the news in its stride, with the FTSE largely shrugging off the political turmoil, reflecting the international earnings of its largest constituents and their limited exposure to domestic politics. The action, such as it was, lay in rates and currencies.

For now, investors are in a holding pattern, content to wait for the contest to produce a leader and, crucially, a set of economic signals. The longer the uncertainty over fiscal policy persists, the greater the risk that the bond market's patience runs thin.

Background

Sir Keir Starmer's resignation followed a defence funding dispute that cost him his defence secretary, heavy local election losses in May and the rise of Reform UK. The same argument over spending that helped topple him, between ministers seeking more money and a chancellor determined to hold the line, is precisely the tension markets fear could resurface under a new leader.

What happens next will be dictated by the leadership contest's economic centre of gravity. With nominations opening on 9 July and a new leader due by 1 September, investors face weeks of waiting before they learn whether Britain's fiscal anchor holds, or begins to drag.