The Strait of Hormuz blockade now poses an unprecedented threat to the global semiconductor supply chain, with Taiwan’s chip industry facing acute energy vulnerabilities that could cascade across AI data centers, smartphones, and computing infrastructure worldwide. As the US-Iran conflict enters its third week and Iran deploys sea mines with no clear timeline for reopening, the blockade represents a geopolitical earthquake rattling the foundations of an industry that depends on fragile, continuous flows of energy, materials, and manufacturing.
Key Takeaways
- Taiwan imports 70% of crude oil and 30-33.7% of LNG from the Middle East, creating acute energy vulnerability
- TSMC alone consumes 9-10% of Taiwan’s total electricity, making semiconductor production energy-intensive
- Taiwan, South Korea, and Japan together manufacture 51% of the world’s semiconductors
- European LNG prices have risen over 60% due to the blockade
- Taiwan holds only 1.5 weeks of LNG reserves, leaving no margin for extended disruption
Why the Strait of Hormuz blockade threatens chip manufacturing
Taiwan generates 85% of its electricity from thermal power, making the island critically dependent on imported crude oil and liquefied natural gas (LNG). The Strait of Hormuz, through which roughly 70% of Taiwan’s crude oil and 30-33.7% of its LNG flows, now faces Iranian sea mines with no announced timeline for reopening. Taiwan’s LNG reserves cover only approximately 1.5 weeks of consumption, leaving almost no buffer against extended disruption. Every dollar increase in oil prices acts as a direct tax on the world’s computing power, raising production costs across every fabrication plant on the island. If the blockade persists for weeks, markets will first react through tight LNG supply expectations, rising electricity price pressure, and downward revisions to profit forecasts for energy-intensive industries.
TSMC, the world’s dominant manufacturer of advanced processing chips, accounts for roughly 9-10% of Taiwan’s total electricity consumption. The company produces approximately 70% of the advanced processing chips used in smartphones, computers, and data centers globally. A sustained energy shortage would directly throttle the production of chips powering AI training systems, AI inference workloads, high-performance computing, and next-generation automotive systems. Taiwan’s stock market has already reacted sharply—the TAIEX index fell 4.4% following the conflict, while TSMC shares lost over 5% on the Taipei Stock Exchange.
Critical materials face shortage risks from Strait of Hormuz blockade
Beyond energy, the blockade threatens three critical materials: helium, liquefied natural gas for data center power, and aluminum. Helium is essential for semiconductor manufacturing, and while some Taiwanese companies claim to hold years’ worth in reserve, South Korean firms like Samsung and SK hynix are closely monitoring the situation as any long-term disruption could impact memory chip supply. LNG powers both electricity generation via gas turbines and AI data centers operated by companies like xAI and OpenAI, creating dual pressure on supply. One-third of China’s total LNG use flows through the Strait, meaning the blockade also threatens production capacity across Asia’s second-largest semiconductor ecosystem.
The semiconductor industry is valued at $611 billion globally, with Taiwan, South Korea, and Japan accounting for 51% of all semiconductor manufacturing. South Korea alone manufactures over 50% of the world’s DRAM and NAND memory chips. A prolonged energy crisis would ripple across all three nations. European LNG prices have already surged over 60% in response to the blockade, signaling how quickly energy markets price in supply disruption risk.
Cascading supply chain failures and market responses
The blockade has already triggered supply chain diversification. Tower Semiconductor, Israel’s largest wafer foundry and a key supplier for Intel, Samsung, and Broadcom, faces severe shipment disruptions. Customers are now shifting critical orders from Tower to secondary Taiwanese foundries like UMC, VIS, and PSMC, treating them as safe harbors in an unstable geopolitical environment. This reprieve for mature-node chipmakers masks a deeper fragility: the world’s most advanced semiconductors depend almost entirely on Taiwan’s energy infrastructure, and that infrastructure is now under direct threat.
Taiwan’s infrastructure gap is widening dangerously. The country shut down its last nuclear power plant in May 2025 and passed legislation in November 2025 that makes building large-scale solar farms nearly impossible. Meanwhile, TSMC continues accelerating production to meet explosive AI data center demand. If chip manufacturing ambition outpaces infrastructure investment, the gap becomes dangerous. World-class manufacturing cannot be sustained indefinitely on infrastructure anxiety.
What happens if the blockade extends beyond weeks?
Markets have not yet fully priced in a worst-case scenario. Analysts at Bernstein suggest TSMC expects little disruption in the near term, but this assessment assumes the blockade resolves within days or a few weeks. If Iran maintains sea mines and the Strait remains closed for months, cascading effects would become unavoidable: electricity rationing in Taiwan, production cuts at TSMC and secondary foundries, helium and LNG shortages across Asia, and accelerating price inflation for chips globally. The modern economy is built on fragile confidence in continuous flow—continuous energy, continuous shipping, continuous manufacturing, and continuous computation. The Strait of Hormuz blockade now tests that confidence directly.
Is the Strait of Hormuz blockade already impacting chip prices?
Market indices have already reacted sharply. TSMC shares fell over 5%, the TAIEX index dropped 4.4%, South Korea’s Kospi fell approximately 12%, and Japan’s Nikkei 225 fell approximately 8.6%. These declines reflect investor concern about sustained energy costs and production disruption, but they do not yet reflect actual chip shortages. That lag—between geopolitical risk and physical supply disruption—is where the real danger lies.
How long can Taiwan’s chip industry operate without Middle Eastern energy imports?
Taiwan holds LNG reserves covering approximately 1.5 weeks of consumption. If the blockade persists beyond that window, the island would need to source LNG from alternative suppliers (Australia, the US, or others), but those contracts take time to arrange and shipping routes require weeks. Crude oil reserves are similarly constrained. The Strait of Hormuz carries roughly 70% of Taiwan’s oil imports, and alternative routes—around Africa or through Asian pipelines—add cost and time. The island has no margin for extended disruption.
The Strait of Hormuz blockade represents a rare convergence of geopolitical conflict and semiconductor supply chain vulnerability. Unlike COVID-19 lockdowns, which disrupted manufacturing directly, this crisis threatens the energy foundation sustaining the world’s most advanced chip production. Taiwan remains ahead in execution, but it must match chip ambition with infrastructure ambition to maintain leadership. Without rapid resolution or alternative energy sourcing, the blockade will force production cuts that ripple across AI, smartphones, and computing globally.
Edited by the All Things Geek team.
Source: Tom's Hardware
