Iran Conflict and Hormuz Blockade Push Oil and Fuel Costs Higher as Trump’s Approval Slumps

Persistent disruption to tanker traffic through the Strait of Hormuz amid the ongoing US–Iran conflict is keeping global oil and fuel prices elevated, even as US President Donald Trump faces a fresh slide in approval ratings. With crude benchmarks swinging around multi‑month highs and US gasoline firmly above pre‑war levels, feed and food supply chains face sustained cost pressure.

Recent polling cited by US media shows Trump’s overall job approval falling into the low‑30s, matching prior lows, with voters increasingly blaming the Iran war and higher fuel prices for a deteriorating cost of living. At the same time, reports from the Middle East indicate that Iran continues to exert tight control over Hormuz shipping, with only a handful of tankers transiting daily compared with normal flows that once carried roughly one‑fifth of globally traded oil and gas.

Introduction

The political backdrop in Washington has turned more fragile as oil market tensions persist. A new Reuters/Ipsos poll, summarized by US outlets on August 18, shows Trump’s approval rating around 33%, down from mid‑30s earlier this month, as voters express deep concern about the war’s duration and its impact on gasoline prices.

In parallel, coverage from the Associated Press and regional briefings underscores that the Strait of Hormuz remains effectively constrained by Iran, despite intermittent talks to reopen the waterway. Prior to the conflict, the strait handled close to 20% of seaborne oil and gas trade; today, traffic is running at a fraction of normal volumes, forcing refiners and traders to reroute cargoes and lean more heavily on inventories.

Immediate Market Impact

Oil prices have remained volatile but elevated as traders weigh the likelihood and timing of any reopening of Hormuz. Brent briefly traded above $90 per barrel last week before easing back into the high‑$80s, while US benchmark crude has oscillated in the low‑$80s. Market commentary links these swings directly to the stalemate over Iran and the uncertainty surrounding tanker security and transit rights.

For downstream markets, the bottleneck is feeding through to refined products. US average gasoline prices have moved back above $4 per gallon, more than $1 above pre‑war levels, according to recent economic briefings. This is raising freight and input costs for agricultural and food supply chains worldwide, while also tightening margins for processors that are reluctant to pass through the full extent of cost increases to consumers in the face of weakening demand.

Supply Chain Disruptions

With Iran maintaining de facto control over the Strait of Hormuz and insisting that no tanker can transit safely without its authorization, oil and LPG flows from the Gulf remain severely curtailed. Reports of drone attacks on tankers and threats against Gulf states have further increased risk premia and insurance costs for vessels in the region.

Refiners in Europe and Asia are redirecting procurement toward West African, US Gulf, North Sea and Latin American grades where possible, but pipeline and terminal capacity constraints limit how quickly these alternative routes can scale. The result is longer voyage times, higher freight rates and more frequent shipment delays for fuel oil, diesel and LPG cargoes that underpin agricultural production, processing and distribution.

In the US, the administration has tapped the Strategic Petroleum Reserve to steady domestic supply, but stocks have fallen to multi‑year lows, reducing the system’s buffer against further shocks. Logistics networks from grain elevators to cold‑chain distributors are seeing fuel surcharges rise, and some carriers are re‑pricing contracts on a shorter cycle to reflect crude volatility.

Commodities Potentially Affected

• Crude oil and refined fuels: Directly hit by reduced Hormuz throughput, higher risk premia and supply rerouting, keeping Brent and WTI elevated and gasoline above pre‑war levels.
• Grains and oilseeds (wheat, corn, soybeans): Increased diesel and gasoline costs raise planting, harvest and transport expenses, particularly in the US and EU, while higher bunker fuel costs lift ocean freight rates for bulk carriers.
• Vegetable oils and sugar: Energy‑intensive refining and shipping make these products sensitive to higher fuel and freight costs, potentially widening basis levels between origins and destinations.
• Meat and dairy: Elevated feed, refrigeration and transport costs squeeze processor margins and can slow throughput, especially in export‑oriented supply chains.
• Fertilizers and agrochemicals: Many nitrogen fertilizers are gas‑linked; disruption to Gulf gas and condensate exports can tighten global supply and support higher input prices for farmers.

Regional Trade Implications

Middle Eastern exporters that rely on Hormuz, including Saudi Arabia, the UAE, Kuwait and Qatar, face reduced export volumes and higher shipping and insurance costs. Although some crude is being re‑routed via alternative pipelines and ports, these workarounds cannot fully replace pre‑war seaborne capacity through the strait.

Conversely, non‑Hormuz suppliers are seeing enhanced pricing power and stronger demand. US Gulf producers are exporting more crude and refined products to Europe and Latin America, while Atlantic Basin and West African grades gain market share in Asia. This shift reinforces the importance of US and Brazilian export hubs for fuel‑intensive agricultural trade, particularly for corn, soybeans and meat.

Import‑dependent regions such as South Asia, parts of Africa and smaller island economies are most exposed to freight and fuel cost spikes. Higher landed prices for fuels and food staples risk worsening inflation and could prompt some governments to adjust tariffs, subsidies or reserve requirements to manage domestic price pressures.

Market Outlook

In the short term, commodity markets are likely to remain sensitive to headlines on Hormuz negotiations and any sign of de‑escalation or renewed attacks. Oil futures are already reflecting a risk premium for prolonged disruption, and any credible pathway to reopening the strait could trigger a sharp pullback in crude and product prices.

However, the political dimension is becoming more prominent as Trump’s declining approval constrains room for maneuver ahead of the November midterms. Energy policy decisions—such as additional SPR releases, temporary tax measures or diplomatic concessions on Iran—will be closely watched for their potential to shift fuel costs and inflation expectations. Traders should expect continued volatility across energy and related agricultural markets until there is clearer visibility on both the conflict trajectory and US domestic policy response.

CMB Market Insight

The intersection of geopolitics, domestic US politics and a critical maritime choke point is creating a complex risk environment for commodity markets. The Iran–Hormuz crisis has evolved from a pure oil supply shock into a broader cost‑of‑living issue that is feeding back into US political dynamics, with potential implications for future sanctions, military posture and energy policy.

For agricultural and food industry participants, the key strategic takeaway is that elevated fuel and freight costs may persist even without a further upside break in crude prices. Risk managers should stress‑test logistics budgets, review freight and energy hedging strategies, and monitor policy signals out of Washington and Tehran that could quickly reprice energy and, by extension, global food supply chains.