Iranian foreign ministry spokesperson says US proposal is still being considered Sign up to the Independent Climate email for the latest advice on saving the planet Get our free Climate email Get our free Climate email Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice Oil prices fell sharply and Asian stock markets surged to record highs as hopes grew that the US and Iran were nearing a deal to reopen the Strait of Hormuz ,