Oil prices rise after the US attacks on Iran Brent and WTI oil indices rose by 0.5% following reports of an American attack on the Iranian island of Qeshm. "Just as the markets were starting to price in a more diplomatic path, this reminder of ongoing military activity turned the tone," Tim Waters, chief market analyst at KCM Trade, told Reuters. The attack followed US President Donald Trump's claims of the biggest drops in oil prices while negotiating with Iran. substack | talk.