Brent for October fell as much as 7.3% to US$81.55 a barrel after Trump said he'd agreed to call off a massive attack on Iran. (Aug 3): Oil dropped and US equity-index futures rose after President Donald Trump said fresh US-Iran talks would begin Monday, boosting optimism the two sides could reach a deal to reopen the Strait of Hormuz. The risk-sensitive Australian dollar led gains against the greenback, while the yen slipped as traders remainedalert for further coordinated intervention to support the currency. Iranian Foreign Minister Abbas Araghchi said earlier Sunday on Telegram that negotiations between Iran and Oman are in the final stages. "It would have been the biggest attack since World War II," Trump said Sunday to reporters on Air Force One.