New Delhi, June 16 -- The tentative agreement to end the war in Iran and reopen the Strait of Hormuz would be good news for the global economy. But even as the price of oil dropped Monday, many questions remained about when and how it would start flowing again through the world's most vital artery for energy shipments.

Before the war, the strait carried a fifth of the world's crude oil. Now, it will take time for hundreds of ships trapped in the Persian Gulf to exit through the narrow strait. And Gulf oil producers that throttled back production will need time to get the oil moving again. Analysts also say ship captains may take their time to decide if passage is safe and that the threat of attack from Iran has truly receded.

All told, ...