Bangladesh, April 17 -- The closure of the Strait of Hormuz has triggered what the International Monetary Fund calls a "global yet asymmetric" rupture, disrupting the flow of roughly one-quarter of oil, one-fifth of liquefied natural gas, and one-third of fertiliser supplies. Energy and fertiliser prices have risen, supply chains have rerouted, and financial conditions have tightened unevenly around the world.

Import-dependent economies in Asia, Africa, and parts of Europe have been hit hardest, with many facing higher bond spreads and credit downgrades. As central banks weigh their responses to surging fuel and food prices, the rise in global interest rates is squeezing what little fiscal and policy space developing countries still have...