The market's biggest question as the UK's prime ministerial handover entered its final countdown saw a pivotal turn on Wednesday. According to informed sources, Andy Burnham, set to be formally appointed prime minister next Monday, has decided to name the current Home Secretary, Shabana Mahmood, as Chancellor of the Exchequer. This news swiftly ignited market sentiment, with the sterling index surging as much as 1% on Wednesday to its highest level since July 2, 2025, and holding near that peak during Thursday's Asian trading session.
The pound rose as much as 1.1% against the US dollar, touching an intraday high of 1.3542, its strongest level since May 13. It also performed strongly against the euro, with EUR/GBP falling below 0.8500 for the first time since June 2025. Concurrently, the yield on the UK 10-year government bond fell 4 basis points to 4.94%, with UK gilts significantly outperforming their European and US counterparts.
Relief from the 'Miliband Alert'
The primary driver behind sterling's sharp rise was not that Mahmood is seen by the market as the perfect candidate, but rather that the most concerning option for investors—Energy Secretary Ed Miliband—appears to have been ruled out. Miliband had long been considered a frontrunner for the chancellor role and had collaborated with Burnham on economic plans for months. However, his hardline stance on energy and net-zero issues triggered strong backlash from business and the City of London.
One banker stated plainly that Mahmood "will be welcomed in the City." A survey of investors showed only 5% of respondents supported Miliband for the chancellor position. Pierre Roke, an analyst at Validus Risk Management, noted, "Mahmood is likely to be seen as a more responsible choice than other frontrunners, including Miliband. Her reputation should reassure investors that spending restraint and fiscal credibility will remain priorities."
James Sproule, chief UK economist at Handelsbanken, added, "People were very nervous about Miliband. He was seen as more radical, and therefore potentially less willing to listen to the market." The memory of former Prime Minister Liz Truss's "mini-budget" crisis in September 2016, which triggered a spike in gilt yields and a sterling crash, remains fresh for investors. The market remains highly alert to any potential repeat of such fiscal adventurism.
Who is Shabana Mahmood?
Shabana Mahmood, the current UK Home Secretary, is known for her tough stances on immigration and criminal justice. She belongs to the more socially and fiscally conservative "Blue Labour" faction within the party. The market widely views her as a fiscally disciplined, centrist Labour politician expected to prioritise responsible public finances, stable economic policy, and maintaining investor confidence.
Ray Attrill, head of FX strategy at National Australia Bank, commented, "Mahmood hails from the more socially and fiscally conservative wing of the Labour Party, which has alleviated earlier concerns about a profligate fiscal approach under a Burnham-led Labour government." However, Burnham's own recent remarks have left some uncertainty over the fiscal outlook. He warned in a recent interview that fiscal decisions would be "difficult" and did not rule out the possibility of new wealth taxes. This suggests that even with Mahmood's appointment, the direction of UK fiscal policy remains fluid.
Schedule and Key Factors to Watch
Burnham warned in a recent interview that fiscal decisions would be "very tough" and did not rule out the possibility of new wealth taxes. The Organisation for Economic Co-operation and Development (OECD) has cautioned that the UK's tax burden is already at a record high, suggesting the new government should focus on spending cuts rather than further taxing households and businesses.
Additionally, market expectations for a Bank of England rate hike are rising. Due to rising oil prices from escalating Middle East conflict, money markets have fully priced in one rate hike at the November policy meeting and anticipate a potential second hike by April 2027. It remains uncertain whether the current Chancellor, Rachel Reeves, will retain her role in the new cabinet. Burnham's advisory team includes former Goldman Sachs chief economist Lord Jim O'Neill and former Bank of England chief economist Andy Haldane, hinting that economic strategy may be directed from Downing Street rather than the Treasury.
Burnham will formally take over as Labour leader this Friday (July 17) and is expected to be invited by the King to form a government next Monday (July 20). Formal cabinet appointments will be confirmed on Monday. Reports suggest Miliband may instead be offered the role of Foreign Secretary as a "consolation prize."
Attrill stated, "Sterling has already been the best-performing G10 currency over the past month. I'm curious how much further it can rally if Mahmood is confirmed as chancellor. We should know the outcome when Burnham takes over on Monday." Beyond the chancellor appointment, the market is also watching several key variables: whether progress can be made on resetting UK-EU relations at next week's summit, the Bank of England's rate hike path amid inflation pressures, and whether the Burnham government can strike a balance between fiscal discipline and economic growth. Sterling's next moves will depend on the specifics of Mahmood's first budget—and whether the City views it as a reassurance or a new source of uncertainty.
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