Shares fell on Wednesday in Europe and Asia, and oil prices surged nearly 6% after US President Donald Trump said the tentative ceasefire with Iran was over, raising the prospect of renewed military conflict between the two countries.
Asked whether the memorandum of understanding with Iran was over, Trump told reporters at the NATO summit in Ankara: "To me, I think it's over. I don't want to deal with them," according to Reuters.
This came after US Central Command said its forces struck more than 80 targets in Iran overnight, including command-and-control networks, coastal radar installations, anti-ship missile capabilities and vessels operated by the Islamic Revolutionary Guard Corps (IRGC). Washington also revoked a waiver that had allowed Iran to restart oil exports.
Brent crude, the international standard, jumped more than 6% by 10:45 CEST to $78.79 a barrel, while US benchmark crude rose 6.3% to $74.88 a barrel. Both had declined recently to around the levels seen before the war with Iran began in late February.
The latest flare-up, despite commitments to seek a peaceful resolution to the conflict, has added to uncertainty over oil prices after they fell from their peak well above $100 during the war. It also comes amid worries that the craze for artificial intelligence-related shares has pushed prices beyond the productivity gains and profits likely to result from massive investments in computer chip production capacity and data centres.
