April 30 : Brent crude prices jumped to a fresh four-year high on Thursday on concerns that the U.S.-Iran war could worsen and lead to a protracted Middle East oil supply disruption that could hurt global economic growth.    Brent crude futures rose $4.28, or 3.63 per cent, to $122.31 a barrel as of 0659 GMT, after touching an intraday high of $126.41, the loftiest since March 9, 2022. The front-month June contract, up for a ninth day, expires on Thursday. The more active July contract was at $