European Stocks Slide as U.S.-Iran Peace Hopes Fade, UK Political Crisis Deepens

European stock markets opened sharply lower on Tuesday as investor confidence weakened following renewed uncertainty over a possible peace agreement between the United States and Iran. The pan-European .STOXX dropped more than 1%, with major sectors and regional exchanges trading firmly in negative territory amid growing geopolitical concerns.

Market sentiment deteriorated after U.S. President Donald Trump stated that the ongoing ceasefire talks between Washington and Tehran were “on life support.” Trump described Iran’s latest response to the U.S. proposal as “unacceptable,” raising fears that efforts to end the month-long conflict may collapse. Investors reacted cautiously as tensions in the Middle East once again threatened global economic stability.

The renewed uncertainty pushed oil prices higher overnight, while markets across the Asia-Pacific region delivered mixed performances. Investors are also closely watching upcoming U.S. inflation data, with economists expecting April consumer prices to rise by 3.7% year-on-year. The inflation reading is expected to influence the next policy moves by the U.S. Federal Reserve and could further shape global market direction in the coming weeks.

In the United Kingdom, political tensions added to the pressure facing European markets. More than 70 lawmakers from the ruling Labour Party have reportedly called on Prime Minister Keir Starmer to either resign or announce a timeline for stepping down following the party’s poor performance in recent local elections. Although Starmer admitted there were “doubters” within the party and promised to confront the country’s challenges, several ministerial aides resigned shortly after his remarks, deepening concerns over political instability.

The uncertainty weighed heavily on British financial assets, with the pound weakening against both the U.S. dollar and the euro. Banking stocks also recorded major losses, including NatWest Group, Lloyds Banking Group and Barclays. Meanwhile, investors continued to monitor corporate earnings reports from companies such as Siemens Energy and Imperial Brands as markets searched for signs of stability amid rising global uncertainty.

source: cnbc