How trade wars and geopolitical conflicts are reshaping the price landscape of US agricultural exports

Trade Policy and Geopolitical Conflict Converge: US Gulf Agricultural Export Prices Enter a Period of Structural Adjustment

US agricultural export prices are experiencing the most complex macroeconomic environment in a generation. The retaliatory measures triggered by the Trump administration's tariffs on China, along with the military conflict between the US and Iran causing disruptions in shipping through the Strait of Hormuz, are two structural forces simultaneously impacting the pricing system for agricultural exports from the US Gulf of Mexico in 2025-2026. Relying solely on price signals from the futures market is no longer sufficient to understand the full market picture; spot price data at the origin level has become a key tool for insight.

Restructuring of Pricing Logic Under Dual Shocks

On the trade policy front, China's retaliatory tariffs on US corn, soybeans, and wheat have significantly dampened demand from Chinese buyers. Taking soybeans as an example, US-origin soybeans face an effective tariff rate of 23%, while those from other countries face only 3%, making US supplies commercially unviable in the Chinese market. As a result, global soybean trade flows have structurally shifted toward Brazil and Argentina, compressing the value of US Gulf exports and weakening the seasonal demand pull that US farmers have relied on for years.

On the geopolitical conflict front, the US-Iran conflict that erupted in late February 2026 led to disruptions in shipping through the Strait of Hormuz. Energy price volatility is transmitted to agricultural prices through multiple channels: ethanol margins linked to crude oil pricing, shipping costs for routes bypassing the Persian Gulf, and costs of agricultural inputs such as fertilizers and fuel. For biofuel feedstocks (soybean oil, tallow, corn distillers grains), energy prices directly become pricing inputs through the D4 RIN market and renewable diesel margins. The ceasefire agreement reached in April 2026 and the US-Iran memorandum in June allowed shipping to gradually resume, with crude oil prices falling back to pre-conflict levels, but normal circulation has not yet fully recovered.

Tracking Price Changes for Major Commodities

Corn: FOB US Gulf corn prices rose 9.2% in the 12 months through May 2026, from $202.75/mt to $221.50/mt, with gains concentrated in the latter part. In spring 2026, the market digested the structural loss of Chinese demand and turned its attention to domestic planting conditions. The USDA's June 30 planted acreage report showed corn acreage virtually unchanged from the March estimate at 95.3 million acres, and the market reaction was muted, with attention shifting to summer crop progress and high temperature threats.

Soybeans and Soybean Oil: The shift in Chinese demand has put pressure on US Gulf soybean export prices. For soybean oil, the US has built an independent domestic market through import restrictions, expanded renewable fuel quotas, and tariffs on Argentine soybean oil. In June 2026, the US Department of Energy revised the GREET model, removing penalties for indirect land-use change, increasing the credit value of soybean oil biodiesel from approximately $0.35/gallon to $0.60/gallon. The USDA also released technical guidelines for 45Z low-carbon feedstocks. Domestic soybean oil consumption rose for the third consecutive month, inventories tightened, and domestic premiums may remain at structurally high levels.Wheat: Black Sea origins (Ukraine and Russia) have consolidated their position as price setters in global tenders. With the start of the Northern Hemisphere harvest in late June 2026, initial barley production in Ukraine and Russia is strong, putting supply pressure on the entire wheat market. US hard red winter wheat is only marginally competitive when there is a quality premium, and importers continue to maintain a demand-based purchasing strategy.

Tallow and Corn Distillers Dried Grains: Supply is a hard constraint. Animal fat supply is directly limited by slaughter rates. In the first six months of 2026, US cattle slaughter decreased by 7.8% year-on-year, leading to structurally tight tallow supply. Corn distillers dried grains production is tied to ethanol production, and both are difficult to expand rapidly. In the last week of June 2026, a concentrated arrival of imported UCO caused animal fat and DCO prices to fall by 6.78% and 6.88% respectively, but market participants consider this a short-term imbalance. D4 RIN prices remain above $2.40/RIN, and the demand base is solid. DCO maintains the highest position in the 45Z feedstock credit hierarchy, with a revised credit value of approximately $0.80/gallon.

Industry Impact: Deep Adjustments in Trade Flows, Policies, and Supply Chains

• Agricultural Productivity: Price fluctuations may accelerate the adoption of precision agriculture technologies by US farmers to reduce costs, but the short-term impact is limited.
• Farm Operation Models: Disrupted exports to China force farmers to turn to domestic markets and alternative export destinations, or adjust planting structures, such as increasing soybean acreage to meet biofuel demand.
• Grain Supply Chain: The center of gravity of global soybean trade flows further shifts to South America, eroding the export status of the US Gulf.
• Food Prices: Biofuel policies push up the costs of oils and feed ingredients, which may pass through to final food prices.
• Agricultural Investment Direction: Renewable fuel policies guide capital flows toward low-carbon feedstock production and biorefining, with carbon intensity calculations under the 45Z framework becoming a key investment variable.
• Global Trade Pattern: The decoupling of agricultural trade between China and the US accelerates, with China reducing dependence on the US and diversifying import sources.
• Agricultural Sustainability: The combination of biofuel demand and low-carbon policies promotes regenerative agricultural practices and the development of carbon farming projects.

Future Observations: Structural Trends and Uncertainties

Over the next 3-5 years, the following key signals will determine the direction of US agricultural export prices:

1. Sino-US Trade Relations: Can China resume large-scale purchases of US agricultural products after the effective tariff differential narrows? China's five-year agricultural plan released in April 2026 aims to reduce soybean imports by 21.5% from the 2023-25 average by 2035, indicating a structural decline in demand rather than cyclical fluctuations.

2. Biofuel Policies: The continuity of Renewable Fuel Obligations (RVO) and the 45Z framework. If policies continue, domestic prices for US soybean oil, tallow, and DCO will decouple from international markets, with domestic premiums persisting in the long term. Policy adjustment risks (e.g., lowering quotas) may trigger sharp price volatility.3. Geopolitical Risks: US-Iran relations and the safety of navigation in the Strait of Hormuz. Although a ceasefire has been reached, regional instability may once again disrupt global energy markets, thereby impacting agricultural product costs.

4. Weather and Climate Change: In the summer of 2026, the main production areas in the US face the threat of heatwaves, and the weather premium has returned. In the long term, the increasing frequency of extreme weather events will raise the demand for agricultural risk management tools and climate adaptation technologies.

5. Global Supply Pattern: The sustained competitive advantage of Black Sea wheat and the expansion of South American soybean export capacity will compress the global market share of US agricultural products. US farmers need to maintain competitiveness by improving efficiency and differentiation (such as low-carbon certification).

Conclusion

Export prices of agricultural products from the US Gulf of Mexico are undergoing profound adjustments driven by trade policies and geopolitical conflicts. These changes are not short-term disturbances, but rather reflect structural shifts in global food supply chains, trade flows, and policy frameworks. Market participants need to look beyond futures price fluctuations and deeply understand origin-level pricing, policy dynamics, and logistics bottlenecks in order to make effective decisions in an increasingly complex environment. Tracking spot market data, focusing on changes in Chinese demand, biofuel regulations, and geopolitical situations will be at the core of agricultural product market analysis in the coming years.