Global oil markets are whipsawing between deal optimism and renewed fear as Iran-Oman negotiations to reopen the Strait of Hormuz enter their most critical week. Oil prices dropped roughly 9% this week, with Brent crude falling to $81.79 and WTI to $76.76, after U.S. Treasury Secretary Scott Bessent said a deal could be reached "today or tomorrow." But the optimism collapsed Thursday after Iran published a restrictive draft plan banning U.S. and Israeli vessels...