British Prime Minister Keir Starmer said Monday he will resign, speaking outside 10 Downing Street less than two years after he led the Labour Party to a landslide election victory. He said he had already informed King Charles III of his decision Monday morning and would stay in office until his party chooses a new leader.

“I have heard the answer from my parliamentary party. I accept that answer with good grace,” Starmer said, calling his walk up Downing Street two years ago the proudest moment of his life. The departure makes him the shortest-serving Labour prime minister in history.

He set a clear timetable. Starmer will remain in the job until a successor is formally chosen, with a new leader expected in place by the time Parliament returns in September. If a single candidate runs unopposed, the handover could happen within weeks.

Financial markets had been bracing for the news for days, and the reaction split three ways. The pound slipped below $1.32 for the first time in three months, trading around $1.319, down about 0.3% on the day. Sterling has now lost roughly 3% since February as Starmer’s grip on power weakened. Against the euro it eased to about 86.76 pence.

Government bonds, known as gilts, told a different story. The yield on the 10-year gilt held near 4.85%, close to its highest level since 2008 and above what other major economies pay to borrow. Higher yields mean it costs the U.K. government more to borrow, and investors are demanding that premium because they are unsure what the next leader will do on spending and taxes.

The stock market barely flinched. The FTSE 100 was little changed, near 10,357 points. Most of the companies in that index earn their money abroad in dollars, so a weaker pound actually makes those overseas profits look bigger when converted back home. The more domestic FTSE 250 is the index to watch if borrowing costs climb and British consumers pull back.

The collapse in support was years in the making. Starmer won a huge majority in July 2024, but heavy losses in May’s local elections, sinking poll numbers and a revolt among his own lawmakers wore him down. His net favorability had fallen to about -45% in the past week. Scandals over scrapped winter fuel payments for pensioners, free gifts to ministers and the fallout involving Lord Peter Mandelson all chipped away at his standing.

The clear favorite to replace him is Andy Burnham, the former mayor of Greater Manchester. Burnham won a by-election in Makerfield last week and was sworn in as a member of Parliament on Monday. He said he would put himself forward and urged an orderly, responsible handover. Investors are wary of him. He has leaned toward a more interventionist, higher-spending approach in the past, though he has worked recently to reassure the bond market.

Starmer’s exit hands Britain its seventh prime minister in a decade, almost exactly 10 years after the country voted to leave the European Union. David Cameron, Theresa May, Boris Johnson, Liz Truss and Rishi Sunak all came and went in that span. The most painful market memory is Truss, whose 2022 package of unfunded tax cuts sent gilt yields soaring and the pound tumbling within days.

For households and businesses, the most immediate effect is the weaker pound. A softer currency makes imported goods, foreign holidays and anything priced in dollars more expensive. Companies that buy parts or materials from overseas suppliers will feel it in their costs, and some of that filters down to ordinary shoppers.

The deeper question is fiscal. Chancellor Rachel Reeves has held the government to a tight budget framework, and markets want to know whether the next prime minister will stick to it. Susannah Streeter, chief investment strategist at Wealth Club, said investors will pay a premium for stability and a clear long-term economic plan after years of political churn. Kallum Pickering, chief economist at Peel Hunt, said Britain borrows too much but is not an outlier compared with other big economies.

Some analysts argued the bigger driver for global markets on Monday was not Westminster at all. Andreas Lipkow of CMC Markets said traders were focused more on the U.S.-Iran talks and energy prices than on British political drama.

Here is the plain bottom line. The resignation was expected, so markets did not panic. The real test comes next: whoever takes over will have to convince nervous investors, and a watching public, that Britain’s finances are in steady hands.

JBizNews Desk | New York

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