U.S. gasoline prices will spike further if the Trump Administration bans diesel exports, Morgan Stanley analysts say, as restrictions remain a debate amid record-high diesel prices in America. “A diesel export ban could have the counterintuitive effect of an increase in gasoline prices if US refiners cut runs,” analysts at Morgan Stanley wrote in a note carried by Bloomberg. A ban on diesel exports would force U.S. refiners to cut refinery utilization rates because they would run out of storage for the diesel within just a few…