Oil prices are on track for their biggest monthly fall since 2020, as investors hoped for an end to the US-Israel war on Iran . The price of Brent crude futures, the global benchmark, was down 1.3% on Friday at about $92 and 19% since the end of April. The optimism came after Donald Trump circulated a draft peace agreement for the war in Iran among allies. The US news site Axios reported that the US and Iran had reached a tentative deal to extend a ceasefire by 60 days, although it added that Trump had yet to agree to the terms. The US vice-president, JD Vance, said a deal was “not there yet” but “very close”. The war in Iran has lasted 90 days and caused chaos across the global economy after Iran responded by closing the strait of Hormuz to shipping. That shut off a large proportion of exports from the Gulf, one of the world’s key oil-producing regions.…