The main Chicago wheat futures contract once rose 3.1%, the biggest increase in a week. Prices for soybeans and corn have also risen. Concerns about the interruption of grain exports to the Black Sea region have been heightened after the attack on Russia's major grain-exporting ports.

The main Chicago wheat futures contract once rose 3.1%, the biggest increase in a week. Prices for soybeans and corn have also risen. Concerns about the interruption of grain exports to the Black Sea region have been heightened after the attack on Russia's major grain-exporting ports.