London stocks slip as Starmer resignation shakes UK market sentiment

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London stocks slip on Starmer resignation

Highlights

FTSE 100 falls 0.1% and FTSE 250 drops 0.7% by 0930 GMT after Keir Starmer announces resignation, pressuring UK domestic stocks and weakening sterling 0.1%.
Benchmark 10-year gilt yield hits highest level since 2008, as investors weigh new leadership's fiscal approach amid debt and rising borrowing costs.
easyJet surges 3.1% after Castlelake launches a £4.74 billion takeover bid, while Babcock International slides 5.2% following a 19% decline in annual underlying operating profit.

Political shock hits domestic UK shares

As reported by Reuters, London's domestically focused stock indexes are under pressure after Starmer says he will resign, opening the way for Britain to have its seventh leader in a decade. By 0930 GMT, the FTSE 100 is down 0.1% while the FTSE 250 drops 0.7%, with rate-sensitive household goods and home-construction stocks falling more than 1% and sterling easing 0.1% against the dollar.

Greater Manchester mayor Andy Burnham is seen as the leading candidate to become prime minister, while former health minister Wes Streeting is also in the race. Investors and analysts say a leadership change is unlikely to materially alter the broader economic backdrop, even as the next contender faces scrutiny over fiscal policy at a time when concern about debt-funded public spending has pushed the benchmark 10-year gilt yield to its highest level since 2008.

David Morrison, senior market analyst at Trade Nation, says any replacement for Starmer is unlikely to be much different and adds that Streeting could secure a senior role if he backs Burnham. Rachel Reeves, who served as chancellor in Starmer's government, is also seen by markets through the lens of how a new leadership team could reshape fiscal policy.

Debt worries and deal activity shape broader market mood

Citizens have been disappointed with Starmer's handling of the economy as public debt and borrowing costs have risen in recent years, adding to the pressure on domestic stocks. Economic and political uncertainty, together with geopolitical risks, are leaving the FTSE 250 trailing the blue-chip FTSE 100 this year.

Markets are also watching the Middle East, where continuing negotiations over the U.S. and Iran conflict are bringing some relief, although investors are still waiting for clarity on shipping through the Strait of Hormuz. LSEG data indicates traders are pricing in no Bank of England rate change this year.

In corporate moves, easyJet rises 3.1% after Castlelake discloses a 4.74 billion pound takeover bid for the budget airline, whose board had rejected three proposals from the U.S. investment firm. Babcock International falls 5.2% after the defence and engineering group reports a 19% drop in annual underlying operating profit.

This week also marks 10 years since Britain voted to leave the European Union.

In our earlier article on speculation over Keir Starmer’s possible resignation, we explained how renewed leadership uncertainty was quickly spilling into markets, weighing on sterling and keeping investors on edge. We also noted that UK gilts were especially sensitive to any shift in fiscal credibility, with 10-year yields pushing toward post-2008 highs as traders assessed whether a successor would stick to existing fiscal rules.

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