By: Arlan Suderman, Chief Commodities Economist
In March 2026, renewed tensions around Iran and shipping risks near the Strait of Hormuz are forcing commodity markets to confront a familiar vulnerability. The narrow waterway carries a significant share of global oil exports and sits at the centre of energy flows that underpin fertilizer production and agricultural logistics. When instability emerges in this corridor, the consequences rarely remain confined to crude markets. Instead, risk premiums cascade across energy, fertilizer, and grain markets simultaneously, highlighting how tightly global food systems remain tied to geopolitical chokepoints.
Arlan Suderman, Chief Commodities Economist at StoneX, has spent more than three decades analysing the intersection of agricultural markets, energy costs, and global trade flows. His work focuses on how geopolitical shocks and input costs reshape crop economics, giving him a distinctive vantage point on how disruptions in energy corridors such as the Strait of Hormuz can rapidly cascade into fertilizer markets and global grain pricing.
Strait of Hormuz disruption is rapidly transmitting price signals into global fertilizer markets. Fertilizer supply chains depend heavily on Middle East energy and shipping infrastructure, meaning disruptions quickly affect agricultural input costs worldwide. Arlan Suderman, speaking at StoneX's 2026 Global Strategy Summit, explains that "a large portion of the world's fertilizer goes through that region", highlighting the strategic role the shipping corridor plays in agricultural production. Consequently, even the threat of supply interruption can lift fertilizer prices and reshape farmer expectations for the upcoming planting season. Over time, this dynamic increases volatility in grain markets as farmers reassess crop mixes and cost structures.
Energy shocks originating in the Strait of Hormuz often spill into agricultural markets through fuel, logistics, and fertilizer costs. The connection between oil and crops becomes especially visible during geopolitical disruptions, when price signals move rapidly across commodities. Suderman highlights how markets react immediately to geopolitical risk, noting that "gasoline prices at your local station jumped even though the gasoline in their tanks was already available at a cheaper price". As a result, agricultural markets can rise on anticipation rather than actual shortages. Grain and oilseed markets therefore respond to perceived future scarcity, reinforcing how tightly food prices remain tied to energy stability.
The Strait of Hormuz is a key route for oil and fertilizer shipments. When shipping risks increase, energy prices and fertilizer costs rise, which directly influences agricultural production costs and crop prices.
Oil prices affect grain markets through fuel costs, fertilizer production, and transportation expenses. When oil rises due to geopolitical shocks, these costs increase and can push agricultural prices higher.
According to Suderman, markets are primarily reacting to the risk of future disruption rather than current shortages. Anticipation of supply problems often drives prices higher before actual shortages occur.
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--- Expert: Arlan Suderman, StoneX Chief Commodities Economist
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