Hormuz Blockade Threatens Global Chip Supply via Energy Chokepoint

Taiwan's 11-Day LNG Reserve Puts Chip Fabs at Imminent Risk

A potential blockade of the Strait of Hormuz creates an existential threat for Taiwan's semiconductor industry by targeting its most critical vulnerability: electricity. According to a March 18 Barclays research report, Taiwan holds a mere 11-day strategic reserve of liquefied natural gas (LNG), a fuel that generates 48% of the island's power. With its last nuclear reactor set to decommission in 2025, Taiwan has no meaningful backup to offset a disruption in LNG imports, a third of which transit the strait. The risk is highly concentrated, as the tech sector consumes 25% of Taiwan's power, with industry leader TSMC alone accounting for 10%.

In contrast, South Korea, which faces a similar shipping disruption and holds only 9 days of LNG reserves, possesses greater resilience. Barclays analysts note that South Korea can counter a 16% gas shortfall by increasing its nuclear power utilization from 60% to over 85%. For Taiwan's advanced foundries, where even a momentary voltage fluctuation can destroy entire batches of high-value wafers, the lack of a stable energy buffer presents a catastrophic production risk.

Specialty Gas Dependency Nears 97%, Creating a Hidden Chokepoint

Beyond energy, the Strait of Hormuz serves as an indispensable channel for specialty chemicals crucial to semiconductor fabrication. The Barclays report reveals an alarming level of dependency for both South Korea and Taiwan on materials sourced from the Middle East. For Bromine, a gas essential for chip etching, Taiwan's import reliance on Israel is 95%, while South Korea's is 97%. Similarly, dependency on Gulf states for Helium reaches 69% for Taiwan and 55% for South Korea.

While major producers maintain inventories for several months, a blockade extending beyond three months would exhaust these stockpiles and halt production. The interconnected nature of the supply chain means a shutdown in one area triggers a domino effect. For example, if power outages halt GPU packaging in Taiwan, the demand for high-bandwidth memory (HBM) chips from South Korea would collapse, transmitting the shock across the industry.

Petrochemical Firms Declare Force Majeure as Supply Lines Fray

The theoretical risks are already becoming reality in adjacent industries. Taiwanese industrial giant Formosa Plastics Group has declared force majeure, citing unavoidable delays in crude oil and raw material shipments. Executives noted that inventories for naphtha—a key petrochemical feedstock—are low across Asia, forcing production cuts. This disruption is a leading indicator for the chip sector, as petrochemicals are foundational for everything from chip substrates to photoresists.

Market analysts warn that investors are underestimating the potential for an "outsized growth shock." A supply-driven contraction in semiconductor output, set against steady global demand, would directly inflate chip prices even as production volumes fall. Central banks in Singapore and Malaysia have already signaled heightened vigilance, indicating that the geopolitical risk is now a primary factor in regional monetary policy decisions.