Key Takeaways:
Reports that Home Secretary Shabana Mahmood will become Britain's next Treasury chief sent the pound to a one-year high and pushed gilt yields to their lowest in weeks, as investors bet on fiscal restraint over the big-spending alternative.
UK government bonds rallied and sterling climbed to a one-year high against the euro after reports that Home Secretary Shabana Mahmood is set to become Treasury chief under incoming Prime Minister Andy Burnham, easing investor concerns about a more left-leaning alternative.
"The market reaction reflects relief that the more fiscally conservative candidate appears to have won the race for No 11," said James Rossiter, macroeconomist at TD Securities.
The 10-year gilt yield fell as low as 4.925 percent late Wednesday, down from an eight-week peak of 5.047 percent, Tradeweb data show. Sterling strengthened 0.6 percent against the euro to above €1.18, its strongest since June 2025, and gained as much as 0.8 percent against the dollar to above $1.35. The euro slid to a 13-month low of 0.8453 pounds.
The appointment, expected to be confirmed when Burnham takes office Monday, will be an early test of whether the new government can balance its spending ambitions with market discipline. Mahmood, who has never held an economic brief in government, would inherit an economy that grew just 0.1 percent in May while facing pressure from rising energy costs linked to the Iran conflict.
Previous speculation that Energy Secretary Ed Miliband could get the job had rattled investors worried about higher government spending and tighter environmental regulations that could cap growth in sectors like energy and artificial intelligence. A Bloomberg survey of investors published Wednesday found just 5 percent supported Miliband as chancellor, compared with 11 percent for Mahmood and more than 30 percent for former health secretary Wes Streeting.
"Market participants have feared that Miliband would go for big-spending and strong environmental regulations that could cap UK growth in some key sectors," Rossiter said. Mahmood, by contrast, is associated with the Blue Labour faction that mixes socially conservative views with support for a bigger role for government in the economy, including protecting British industries from foreign competition.
Mahmood's limited economic experience makes her policy approach hard to predict. Her only Treasury role was as shadow financial secretary a decade ago under Ed Miliband. "Markets like the optics, but there is not yet much policy substance," said Patrick Munnelly, market strategist at Tickmill Group.
The economic backdrop adds urgency to the appointment. UK gross domestic product grew just 0.1 percent in May after a 0.1 percent contraction in April, the Office for National Statistics said Wednesday. Services output rose 0.3 percent, while production fell 0.5 percent and construction dropped 0.8 percent. Brent crude remains near $85 a barrel after rising from around $72 before the Iran conflict escalated in late February.
"Mahmood is likely to be seen as a more responsible choice than other frontrunners, including Ed Miliband," said Pierre Roke, global capital market analyst at Validus Risk Management. Her reputation should reassure investors that "spending restraint and fiscal credibility will remain priorities," he said.
Still, some analysts caution that the market rally may be premature. The last time a new Labour government took office with similar market optimism was in 1997, when gilt yields initially fell before rising 150 basis points over the following year as spending exceeded expectations. Investors are likely to focus on Mahmood's stance on public spending and how much influence she will have over Burnham, who has signaled openness to wealth taxes and higher capital gains levies.
"If Mahmood is confirmed as the new Treasury chief, this should calm UK political concerns in the near term," RBC Capital Markets strategists said in a note. The question is whether that calm lasts beyond the first budget.
This article is for informational purposes only and does not constitute investment advice.
