Asia, especially China, most hurt by prolonged Hormuz closure.
China is the biggest historical buyer of Iranian oil and had vessels pass through Hormuz over the weekend. A U.S. blockade that stops oil flow to China would be a major political issue and hurt both Iran's revenue and China's supply. Asian economies, particularly South and Southeast Asia, are most hurt by prolonged closure. An additional risk is that Houthi rebels, pressured by Iran, could attack ships in the Red Sea, further tightening oil supplies to Asia by threatening the alternative East-West pipeline route.