Trade & Supply Chain Analysis

The Cascading Global Trade Network: Manufacturing of Critical Products Hinges on Major Global Chokepoints

Key takeaways

An Altana analysis found that even modest disruptions to trade in critical components and materials can cascade through the global supply chain network, putting hundreds of billions — or even trillions — of dollars in downstream production at risk.

$27.9 billion of Gulf polymer exports feed $1.16 trillion of finished vehicles, a 42X amplification of materials to actual product exposure. North America's integrated auto network accounts for about one-fifth, or $227.1 billion, of disrupted trade.
$228.8 billion of Taiwanese semiconductor exports feed $1.19 trillion of compute and communications hardware used in data center infrastructure, a 5X amplification from components to finished products.
$4.9 billion of Chinese permanent magnet exports feed $278.4 billion of defense and aerospace platforms, a 57X amplification that threatens European rearmament.

Even as today’s trade policy prioritizes governance, regulation, economic security, and resilience, an Altana analysis demonstrates how seemingly modest amounts of directly disrupted trade cascade through the global supply chain network into hundreds of billions or even trillions of dollars of critical products.

The analysis evaluated trade networks that run through three major geoeconomic chokepoints — the Strait of Hormuz, the Taiwan Strait, and Chinese export restrictions on rare earths and critical minerals. The analysis found that $27.9 billion of Gulf-region exports of ethylene and propylene polymers that traverse the Strait of Hormuz feeds $1.16 trillion of global auto trade; that a disruption of $228.8 billion of Taiwanese semiconductors and related devices would imperil the production of $1.19 trillion of finished compute and communications systems; and that just $4.9 billion of export-restricted Chinese rare-earth magnets are needed to produce $278.4 billion of vital defense applications.

The analysis further found that for all these chokepoints and downstream end products, a vast network of intermediary components, parts, and sub-manufacturing is also affected. These findings come as global governments and their domestic industries balance goals to surge manufacturing with heightened restrictions on upstream product inputs:

The EU Critical Raw Materials Act sets a 2030 benchmark that no single third country supplies more than 65% of the EU’s annual consumption of any single raw material, at the same time that the EU is turbocharging defense manufacturing that depends on global supply chains.
The UK has designated priority sectors as part of a modern industrial strategy, while also hiking restrictions on Russian commodities and upping enforcement of upstream forced labor exposure.
Japan's Economic Security Promotion Act obliges firms dealing with critical materials such as semiconductors and rare metals to survey their own supply of specified critical goods, just as the country expands its domestic defense manufacturing to support a historic rearmament.
In the United States, the National Defense Authorization Act, Connected Vehicles regulations, and component-based tariffs have shifted trade and tariff enforcement far upstream into product value chains at the same time as a major push for reindustrialization.

Governments and critical industries can simulate these policy actions and possible disruptions in Altana to identify critical dependencies, understand where they hold leverage, and evaluate where to intervene. The analysis below shows how disruption at three major chokepoints could propagate through the global product and supply chain network into vital downstream products.

Hormuz: Overlooked petrochemicals imperil automotive manufacturing in North America and Europe

Disruption in the Strait of Hormuz reaches well beyond energy markets, imperiling hundreds of billions of dollars of global automotive manufacturing and raising vehicle costs through a petrochemical trade that is not often associated with carmaking.

The analysis values Gulf exports of ethylene and propylene polymers — the feedstocks behind nearly every plastic part in a vehicle — at $27.9 billion per year. Saudi Arabia and the United Arab Emirates alone account for nearly four-fifths (79%) of that trade.

$27.9B Gulf polymer exports

$227.1B Value of disrupted North American auto products

$182.4B Value of exposed German automotive products

Those $27.9 billion of Gulf polymers are feedstocks that filter into $738.4 billion of molded and extruded components — motor vehicle parts, plastic articles, seats, packaging, and tubes and hoses — produced in automotive manufacturing hubs in China, Germany, the U.S., Mexico, Poland, Japan, and other regions.

Product cascade: Strait of Hormuz disruption impact on global automotive manufacturing

Geographic cascade: Strait of Hormuz disruption impact on global automotive manufacturing

The $738.4 billion of molded parts then cascades into $1.16 trillion of finished vehicles — exported primarily by Germany, Japan, Mexico, China, and the U.S.

North America absorbs this cascading disruption as one production system, rather than three standalone national industries. The U.S., Mexico, and Canada export $227.1 billion of finished vehicles in total. 72.4% of that trade is the three countries selling to each other.

The journey of a fuel tank — a single blow-molded part that cannot be changed without re-approving the vehicle platform built around it — demonstrates how a disruption thousands of miles upstream reaches a finished car.

Roughly half of a modern vehicle is plastic by volume. Ethylene cracked from Gulf feedstock becomes high-density polyethylene resin, specified to a grade that will hold fuel safely for the life of the car. That resin is blow-molded into a multilayer tank at a components plant. Automotive homologation rules for blow-molded tanks are strict; any given tank is officially approved for only one car design. Switching to a backup supplier means retesting and recertifying the part, not just placing a new order.

Journey of a blow-molded fuel tank from Gulf polymers to a finished vehicle

Repeated on every car on every assembly line, across a vast and interconnected automotive manufacturing network, disrupting access to Gulf polymers affects more than $1 trillion of global auto trade — and threatens to further raise vehicle prices, which have over the past decade increased faster than inflation.

But if a government could trace geopolitical disruptions forward to the specific parts and automotive production it would idle, a fuel-tank shortage would become visible months before it arrived. With this lead time, policymakers would be able to weigh tapping into strategic reserves against expedited re-approval, or proactively propose coordination with the trading partners that share a similar automotive production system to keep manufacturing humming and prevent consumer price spikes.

Taiwan: A strait blockade cascades into global electronics and the AI data center build-out

Altana's analysis shows that a blockade of the Taiwan Strait would rattle the global electronics network, and imperil the $800 billion-per-year global AI data center build-out.

The analysis values Taiwan’s exports of semiconductor devices and integrated circuits — which are foundational pieces of modern electronic devices — at $228.8 billion per year. This makes up nearly half the value (43%) of Taiwan’s total exports.

$228.8B Total Taiwanese semiconductor exports

43% Semiconductors' share of Taiwan's total exports

$1.19T Downstream data center hardware affected

Those $228.8 billion of Taiwanese semiconductor devices and circuits are components that feed into $470.4 billion of boards, power conversion, switching, and control hardware, which are produced in major electronics manufacturing and assembly hubs in China, the U.S., Germany, Vietnam, South Korea, Mexico, and other regions.

Product cascade: Taiwan Strait closure impact on global data center build-out

Geographic cascade: Taiwan Strait closure impact on global data center build-out

The $470.4 billion of boards, power, and control parts then cascades into $1.19 trillion dollars of finished compute and communications systems — enterprise networking and data transmission hardware such as switches, routers, gateways, modems, transceivers; automatic data processing machines; and more — that are used in data centers.

The journey of an advanced logic die — a specialized semiconductor chip layer that handles processing, computation, and routing functions — demonstrates how a single disruption cascades through the global electronics network and could imperil the global data center build-out.

Taiwan produces and packages 92% of the global supply of advanced logic dies and chips. After fabrication, the die feeds into multiphase, voltage-regulator modules that are made up of controller silicon from Germany or the U.S. and inductors from Japan. Assembly may occur in Malaysia or Vietnam.

The voltage-regulator module is then shipped to a plant in Mexico or Vietnam, where it becomes a component within a populated accelerator board in a server chassis. This finished server chassis becomes a rack that is installed in a multi-billion dollar U.S. data center.

Scaled across the world, for thousands and millions and billions of racks and servers and routers, losing access to the advanced logic dies would choke off trillions of dollars of trade, manufacturing, and investment in the AI boom.

Conversely, if a government could map the network of production its own data center buildout depends on, it could aim economic incentives at the most necessary and hard-to-source electronic components. Policymakers could also test and verify — before committing funds — that new, domestic plants would build resilience.

Policy flashpoint: Rare earth restrictions rattle defense and aerospace as rearmament accelerates

On-and-off restrictions on Chinese rare earth magnet exports could cascade into global defense and aerospace production networks, affecting hundreds of billions of dollars of European rearmament.

The analysis values China's exports of permanent magnets — the components that turn electrical power into physical motion — at only $4.9 billion per year. This is the smallest of the evaluated chokepoints and the most concentrated, as China accounts for more than two-thirds (67%) of all permanent-magnet exports worldwide.

$4.9B Chinese magnet exports

67% China's share of global permanent-magnet exports

57X Amplification into defense and aerospace

The $4.9 billion of Chinese magnets are vital components that feed into $208.0 billion of motors, sensing, optics, and propulsion hardware made for defense applications. This hardware — which is necessary for functional electric motors and generators, radar and radio navigational apparatuses, navigational instruments, lasers, turbine parts, and more — is frequently produced in Vietnam, the U.S., Germany, Japan, and Mexico.

Product cascade: Chinese rare earth magnet restrictions impact on defense and aerospace

Geographic cascade: Chinese rare earth magnet restrictions impact on defense and aerospace

The $208.0 billion of motors, sensing, and propulsion parts then cascades into $278.4 billion of defense and aerospace platforms and munitions — including aircraft and spacecraft and the parts that sustain them, missiles and munitions, warships, armored fighting vehicles, and launching gear. These finished defense applications are commonly finished in and used or exported by the U.S., France, Germany, and the U.K.

A sintered NdFeB magnet demonstrates how policy decisions in Beijing ripple through the global trading and manufacturing network.

China separates and refines almost all of the world's dysprosium and terbium, and has threatened and enacted and negotiated export restrictions on both. Sintered into high-temperature NdFeB magnets, the rare earths provide magnetic strength, thermal stability and a high-power core for motors, guidance systems, and actuators in military equipment — including the servo drives and generator sets inside a Patriot launching station. The servo drives and generator sets slew the launcher onto a bearing, elevate it, and power it into the field.

Journey of a sintered NdFeB magnet into a Patriot launching station

Without access to even a modest amount of rare earths and magnets, then, the missile launcher — and the global defense network’s production of other vital applications — sputters and fails.

On the other hand, if a government could see the exact tiers of production where its defense programs depend on restricted magnets, it could invest in alternative suppliers for the specific components that carry the dependency. The government could also identify the raw materials or vital components that its own domestic industry or allies’ industries are already sourcing or making to better coordinate production.