London’s FTSE 100 index recorded its sharpest single-day decline since May, rattled by comments from Donald Trump that an Iran nuclear deal is now over.
The remarks sent shockwaves through global financial markets, with investors retreating from riskier assets amid fresh geopolitical uncertainty in the Middle East.
Trump’s declaration that the Iran deal is “over” raised immediate concerns about renewed tensions in the region and the potential impact on oil supply chains.
Energy markets reacted sharply to the news, with traders weighing the likelihood of escalating sanctions and their downstream effects on crude output and pricing.
The FTSE 100 bore the brunt of the sell-off in Europe, with the blue-chip index sliding as sentiment turned decidedly negative across trading floors in the City.
Investors had already been navigating a complex macroeconomic environment, with persistent inflation pressures and cautious central bank guidance weighing on appetite for equities.
The breakdown in diplomatic efforts over Iran added a fresh layer of uncertainty that proved too much for markets already operating on thin confidence margins.
Defensive stocks offered some cushion, but broad-based selling across financials, industrials, and consumer discretionary stocks dragged the overall index lower throughout the session.
The losses extended a difficult period for UK equities, which have struggled to maintain momentum against a backdrop of global trade tensions and domestic economic headwinds.
Analysts warned that further volatility could follow if the geopolitical situation deteriorates, with markets likely to remain sensitive to any additional statements from Washington regarding Iran policy.
Trading volumes were elevated during the session, suggesting the sell-off was driven by conviction rather than thin liquidity, pointing to genuine investor concern about the outlook.
Market participants will be watching closely for any response from European allies or international bodies regarding the collapse of the Iran diplomatic framework.
For the FTSE 100, the day’s losses served as a stark reminder of how quickly geopolitical developments can override domestic economic fundamentals and send indices sharply lower.