Despite the sincere efforts by the World Trade Organization (WTO) to keep international markets open, some countries remain quick to block exports when markets become uncertain. Covid-19 and the global shutdowns that followed showed a pattern of export bans from major commodity producers. Russia’s recent invasion of Ukraine has also had a reverberating effect on the grain markets. Many would-be suppliers have instead banned or restricted the sale of their wheat, creating a supply worry and once again proving that not all markets remain reliable.