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How Iran–U.S. Tensions Could Disrupt Energy Flows, Shipping and Supply Chains

How Iran–U.S. Tensions Could Disrupt Energy Flows, Shipping and Supply Chains

Escalating tensions and risk to maritime arteries

Rising hostility between the United States and Iran has heightened fears of interruptions to international trade lanes, with the Strait of Hormuz taking center stage as a vital chokepoint for energy shipments. Analysts and logistics professionals view instability in the region as a direct threat to the movement of oil and other commodities that rely on that passage.

Interview with a supply chain expert

Supply Chain 24/7 spoke with Sarah Jinhui Wu, a Professor of Operations Management at Fordham University’s Gabelli School of Business, to explore how unrest in the Middle East can cascade through shipping networks, energy markets, and global supply chains.

How uncertainty manifests in supply networks

Wu explains that uncertainty typically appears first as increased supply chain variability. She emphasizes that "variability is the enemy of a lean system," because unpredictable conditions force companies to abandon tight, cost-focused practices in favor of measures that preserve continuity.

Operational consequences for carriers and shippers

When conflict disrupts the region, carriers often slow steaming, reroute vessels, or suspend sailings, making shipping lead times less reliable and schedules harder to trust. Those operational changes increase the time goods spend in transit and make planning and forecasting more difficult for all parties in the chain.

Firm-level responses to preserve continuity

In response to rising variability, firms tend to add buffers and prioritize continuity over lean efficiency. Common actions include expedited shipments, raising safety stock levels for critical SKUs, and pursuing multi-sourcing strategies—particularly for inputs that depend on energy and chemicals.

Why energy prices react sharply

Wu identifies two reinforcing channels that drive up fuel and freight costs during regional conflict. The first is an energy price shock: threats to supply continuity and shipment reliability around the Gulf push oil and gas markets to price in scarcity and elevated risk. The Strait of Hormuz is especially significant because about 20 million barrels per day—roughly 20% of global petroleum liquids consumption—transit that route, so even a partial disruption can rapidly alter price expectations.

How logistics amplify the cost shock

The second channel is a logistics cost shock. Carriers commonly add emergency or conflict surcharges, which quickly appear on shipper invoices. Rerouting traffic increases distance and transit time, ties up vessels and aircraft for longer periods, reduces effective capacity and therefore raises freight rates.

Practical knock-on effects across supply chains

The combined impact of longer transit times, higher fuel costs, and added surcharges creates a broad ripple through supply chains. Companies face higher operating expenses and must adjust inventory and sourcing strategies to maintain service levels. Typical consequences include shipment delays, constrained transport capacity, elevated freight charges and a shift in emphasis from cost optimization toward resilience.

Read the full discussion

For the complete interview and more detailed analysis, see the full article.

Read the full interview

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