When Tue Vuong ordered four shipments of wheat grown in the fertile lands around the Black Sea, he expected enough grain to cover roughly a fifth of his Vietnamese flour-milling company's annual needs, a facility located more than 5,000 miles away. That expectation soon collapsed when he was informed that, due to the intensified Russian-Ukrainian conflict during this summer, those vessels would not be loaded or dispatched. "At that moment, I was in a state of complete panic," recalls Vuong, the chief executive of Golden Wheat in Ho Chi Minh City. While the supplier offered to substitute two of the cargoes with Bulgarian wheat, supply gaps forced him into a frantic multi-week scramble to secure alternative sources. "Our vulnerability to a crisis in the Black Sea is immense."

Global attention has been firmly fixed on the Strait of Hormuz and soaring oil prices due to the Middle East turmoil. Yet, the persistent shipping paralysis in the Black Sea is compounding economic damage, stoking inflationary pressures and threatening food security in fragile nations. Bond investors suggest that the risks to food supplies have not yet been fully priced into markets, which remain more focused on commodity costs like energy. Serving as a bridge between Europe and Asia, the Black Sea is a crucial corridor for transporting crops to some of the world's most populous nations. Russia and Ukraine together account for over a quarter of global wheat trade, a share comparable to the proportion of seaborne oil transported through the Gulf's Strait of Hormuz. In one incident, a Russian-flagged cargo vessel was left drifting after a drone attack before running aground near Istanbul on September 7.

Since July, grain supplies have been severely obstructed as both sides escalate attacks on each other's ports, with grain terminals, silos, and vessels repeatedly struck. The escalation has also reached Russia's energy infrastructure, pushing diesel prices to record highs. Since diesel is a vital agricultural input, its rising cost introduces another significant threat to food inflation. Egypt, the world's largest wheat buyer, has now experienced roughly a month without receiving any grain from the Black Sea region. While Russian exports are significantly disrupted by Ukrainian drone strikes, Ukraine struggles to move its harvest via land or river due to port blockades. With the gathered crops piling up, Ukraine faces a critical shortage of storage capacity. Wheat prices have climbed to three-year highs, and currently, there are scant signs that a maritime corridor agreement for Ukrainian grain, brokered by Turkey in 2022, will be revived. Meanwhile, Ukraine's western neighbors have imposed bans on its grain imports.

"For global wheat trade, the Black Sea's significance now rivals that of the Strait of Hormuz for global oil," states Caitlin Welsh, a food security expert at the Center for Strategic and International Studies, a Washington think tank. "The world has underestimated the fallout from these attacks." According to estimates from the research firm SovEcon, combined wheat exports from Russia and Ukraine for the July-September harvest season may ultimately total only about half of what they were during the same period last year. Beyond wheat, these two nations supply two-thirds of global sunflower oil trade and a tenth of corn exports. The agricultural output from these countries reaches every corner of the globe, from bakeries in Egypt and market stalls in India to flour mills in Turkey and livestock and aquaculture operations in Vietnam. Located on the outskirts of Ho Chi Minh City, Golden Wheat imports grain for milling and animal feed, operating within a sector that is expanding to satisfy Southeast Asia's growing food demand. The company successfully rerouted two of its ships to load wheat at Bulgaria's Burgas port, which sits roughly 500 kilometers along the coast from Ukraine's Odesa.

Vuong has maintained close contact with his sellers to verify shipments have departed. He has carefully scrutinized the legal clauses and insurance premiums within supply contracts while closely monitoring news and vessel movements. His concerns extend beyond ships exiting the Black Sea to whether they can safely traverse the Red Sea, an area threatened by Iranian-backed Houthi militants. Even though Golden Wheat in Vietnam eventually secured supplies from Burgas, Bulgaria, the anxieties remain. "Our boats may be insured, but an attack would still leave us facing a supply shortage," Vuong explains. To compensate for the two delayed or missing cargoes, he has turned to sourcing from the United States, albeit at significantly higher prices. Since then, wheat prices have only continued their upward trajectory.