Trump said he wanted the US to be "reimbursed" for protecting a "very rich portion of the world", floating a 20 per cent tax on all cargo shipped through the Strait."There's no doubt that markets have reacted," Khoury told reporters "Now, if the chaos continues in the Middle East, if we get more bizarre Truth Social posts, then oil prices might go up again," Khoury warned.Luke Hartigan, senior lecturer in economics at the University of Sydney, told SBS News that while the prospect of higher fuel prices is a concern, he was unsure at this stage if Trump's threat would have a "major impact"."With Donald Trump, it seems to just change in an instant, so he's bombing [Iran] now, maybe tomorrow he'll be inviting them to the World Cup final," he said