When the world’s narrowest routes begin to break global trade

Global trade has always depended on the sea. Nearly 80 to 90% of goods move by ship, travelling across oceans that appear vast and open. Yet, much of this movement is forced through a handful of narrow maritime passages, points where geography compresses global commerce into tight corridors. These are known as chokepoints, and when they are disrupted, the effects ripple far beyond their immediate location.

Today, that system is under visible strain, beginning with one of the most critical arteries in global trade, the Strait of Hormuz.

Hormuz: The world’s most critical energy gateway
To understand why disruption in the Strait of Hormuz matters, it is important to first understand what it is. Located between Iran and Oman, this narrow passage connects the Persian Gulf to the Arabian Sea and, by extension, to global markets. Despite being only about 33 kilometres wide at its narrowest point, it carries a disproportionate share of the world’s energy flows.

Roughly one-fifth of global oil trade passes through this corridor, along with significant volumes of liquefied natural gas and refined petroleum products. But beyond energy, it also supports containerised trade linking the Gulf to Asia, Europe and Africa.

Recent tensions in the region have exposed just how fragile this dependence is. According to Drewry, even short-term disruption has a cascading impact, with fuel prices rising, shipping costs increasing and global supply chains tightening. Drewry notes that “maritime chokepoint disruptions are becoming both more frequent and interconnected”, highlighting that these events are no longer isolated.

The effects are not limited to fuel. A report by GlobalData highlights a lesser-known risk, the movement of specialty materials such as helium. GlobalData observes that “for the technology sector, the bigger black swan is specialty materials, especially helium”, pointing to a hidden vulnerability in semiconductor and AI supply chains.

This dual role, as both an energy and industrial supply corridor, makes Hormuz uniquely exposed. Tobias Maier, CEO of DHL Global Forwarding Middle East & Africa at DHL Global Forwarding, says, “The Strait of Hormuz is a globally important transit area, and the situation has put a lot of pressure on the GCC logistics ecosystem.”

A safe passage depends on confidence in security, insurance cover and clarity on operating conditions 

Tobias Maier,  DHL Global Forwarding

 Michael Aldwell, Executive Vice President, Sea Logistics at Kuehne+Nagel, reinforces the risk, noting that the strait represents one of the “most acute risk zones due to its strategic role in global trade and energy flows”.

The Red Sea shock and the Suez dependency
While Hormuz represents a present and escalating risk, the global shipping system had already been weakened by earlier disruptions further west. To understand this, one must look at the Suez Canal, a man-made waterway that connects the Mediterranean Sea to the Red Sea.

Opened in 1869, the Suez Canal transformed global trade by eliminating the need for ships to sail around Africa. Today, it handles around 12 % of global trade and is a critical link between Asia and Europe. At its southern end lies the Bab el-Mandeb, a narrow strait between Yemen and Djibouti that acts as the gateway to the Red Sea.

When security risks escalated in this region, shipping lines were forced to avoid the Suez route altogether. Instead, vessels began rerouting via the Cape of Good Hope, a far longer path at the southern tip of Africa.

This shift had immediate consequences. Kathy Liu, VP Global Sales & Marketing at Dimerco, explains, “Asia–Europe supply chain flows have become less direct and more expensive, as carriers reroute vessels via the Cape of Good Hope.” 

The transit times have increased from around 30 days to as much as 50 days, creating ripple effects beyond shipping, impacting inventory planning and production schedules

Kathy Liu, Dimerco 

 From a capacity perspective, the impact has been equally severe. Drewry estimates that diversions affected around 30 % of global container capacity and reduced effective capacity by about 9 %. The consultancy also highlights that freight rates surged sharply following the disruption, underlining how quickly costs escalate when a major corridor is constrained.

What makes this disruption particularly significant is not just its scale, but its persistence. Aldwell notes that “rerouting is increasingly embedded in baseline network planning”, reflecting a shift in how the industry perceives disruption. Maier adds that while some carriers attempted to return to Suez, “that shift is now being delayed”, indicating continued uncertainty.

A system of interdependent chokepoints
The events in Hormuz and the Red Sea reveal a broader reality. Global trade does not rely on isolated routes, but on an interconnected network of chokepoints. When one is disrupted, pressure shifts to others, often amplifying the overall impact.

Consider the Strait of Malacca. Located between Malaysia, Singapore and Indonesia, it is the shortest maritime route between the Indian and Pacific Oceans. More than a quarter of global trade passes through this corridor, including large volumes of containerised goods and energy shipments bound for East Asia. Its geography makes it both indispensable and vulnerable. Liu points out that “over 25 % of global trade passes through the Strait of Malacca”, adding that there is “no true substitute for these chokepoints”.

Similarly, the Panama Canal serves as a critical link between the Atlantic and Pacific Oceans. Completed in 1914, it revolutionised trade between the Americas and Asia. However, recent drought conditions reduced water levels, limiting vessel capacity. Aldwell notes that this “underscored the global economy’s heavy dependence on highly concentrated trade corridors, where limited alternatives can amplify disruption regardless of the initial trigger”.

Further north, the Turkish Straits connect the Black Sea to the Mediterranean. These waterways are vital for the movement of grain, crude oil and bulk commodities. Their strategic importance has been repeatedly highlighted during geopolitical tensions, particularly given their role in linking Eastern Europe to global markets.

At the western entrance to the Mediterranean lies the Strait of Gibraltar, a narrow passage between Spain and Morocco. While often overlooked, it is a key transit point for vessels moving between Europe, Africa and the Americas, handling a mix of container traffic, energy shipments and bulk cargo.

Finally, when major routes fail, ships fall back on the Cape of Good Hope. Historically, this was the primary route between Europe and Asia before the Suez Canal was built. Today, it serves as a critical fallback option, but one that comes with significant cost, time and operational challenges.

Cargo, costs and cascading disruption
Each of these chokepoints handles specific types of cargo that define their importance. Hormuz is dominated by oil and gas, Malacca carries both energy and manufactured goods, Suez is central to containerised trade, Panama supports transcontinental cargo flows, and the Turkish Straits are essential for bulk commodities.

Global cargo does not simply stop when a chokepoint is disrupted, but its movement becomes slower, costlier and less predictable. When a major route such as the Suez Canal or the Strait of Hormuz is affected, vessels are forced to reroute over longer distances, which increases sailing time and reduces available capacity. This leads to delays at destination ports, missed connections, and a knock-on effect across inland transport networks. As congestion builds at alternative hubs, cargo begins to queue, creating a chain reaction where a disruption at one point spreads across the entire supply chain.

When disruption occurs, the impact is not limited to shipping lines. It extends across the entire supply chain. Kaushal Khakhar of Kaybee Exports explains, “Transit times have become unpredictable, and for perishable cargo even minor delays can affect product quality and shelf life.” He adds that freight costs have increased by “15 to 30% in some cases, putting pressure on margins”.

The freight costs have increased by 15 to 30% in some cases, putting pressure on margins 

Kaushal Khakar, Kaybee Exports

 At a national level, the effects are equally pronounced. Pramod Sant, Director General at Federation of Freight Forwarders' Associations in India, describes the situation as “not a crisis in the conventional sense, but a structural rupture”. He warns that “we now face the extraordinary situation of both the Suez and Hormuz routes being disrupted simultaneously”, impacting India’s exports across multiple sectors.

Sant further notes that freight forwarders are “no longer just space buyers but risk advisors”, reflecting how the industry is adapting to a more uncertain operating environment.

From efficiency to resilience
For decades, global trade was built on the assumption that these chokepoints would remain stable. Supply chains were optimised for cost, with just-in-time delivery models and minimal buffers. That assumption is now being challenged.

Smitha Shetty, Director at Achilles Information, explains, “Chokepoints like the Suez Canal and the Strait of Hormuz were long treated as reliable constants in trade planning. That assumption no longer holds.” She adds that organisations are now facing “a compounding effect that many were simply not designed to absorb”.

The organisations are now facing a compounding effect that many were simply not designed to absorb

Smitha Shetty, Achilles Information

This shift is changing how companies approach risk. Shetty notes that businesses are investing in “supplier visibility, scenario planning and deeper supply chain intelligence”, recognising that disruptions are no longer isolated events but part of a broader pattern.

Drewry reinforces this view, stating that global supply chains are “highly vulnerable to disruptions”, particularly when multiple chokepoints are affected at the same time. The consultancy also highlights that while alternative routes exist in some cases, they introduce significant inefficiencies in terms of cost and transit time.

A fragile but resilient system
Despite these challenges, global trade continues to function. Ships are rerouted, costs are absorbed, and supply chains adapt. But the underlying structure remains fragile.

The evidence across all major chokepoints points in the same direction. Disruptions are becoming more frequent, more interconnected and more difficult to manage. As Drewry notes, these are no longer isolated shocks but part of a systemic pattern affecting global trade flows.

The question is no longer whether disruptions will occur, but how often, and how well the system can absorb them. As Maier puts it, “global trade remains structured around well-established corridors, and geography cannot easily be changed”. At the same time, Aldwell observes that the industry is moving towards “more flexible and adaptive supply chain design”.

What is becoming increasingly clear is that these disruptions cannot be fully avoided. The world’s dependence on chokepoints such as the Strait of Hormuz, Suez Canal and Strait of Malacca is rooted in geography, and there are few viable alternatives at scale. As a result, global trade is not moving away from these routes, but learning to operate around their disruptions through rerouting, higher costs and greater complexity.

For now, the system continues to adapt. But as disruptions become more frequent and interconnected, managing them will require deeper resilience, better planning and a willingness to accept that stability in global trade now comes at a higher cost.