The global semiconductor industry's primary concern is not the nominal price of oil, but rather the scant few weeks of energy reserves that would remain following a blockade of the Strait of Hormuz. According to market analysis, a deep-dive report from Barclays' macro research team on March 18 indicates that persistent instability in the Strait of Hormuz is transmitting substantial "tail risks" to the North Asian semiconductor supply chain through energy and critical raw material channels. Macro researcher Bum Ki Son stated plainly in the report, "As the Middle East conflict enters its third week, which coincides with the typical shipping cycle from the Middle East to North Asian ports, energy import disruptions in South Korea and Taiwan will become increasingly apparent starting this week." The market's focus has now shifted beyond whether crude oil prices will breach $100 per barrel to whether the stable electricity and specialty gases essential for semiconductor giants' survival could be depleted due to a blockade.
**Energy Reserves: The Mismatch Between Nominal Days and Actual Buffer** To external observers, South Korea and Taiwan possess considerable strategic petroleum reserves, seemingly adequate to withstand a short-term shock. However, Barclays' report deconstructs the underlying concerns behind these figures. Although South Korea's president previously claimed a 208-day oil reserve, and Taiwan indicated reserves exceeding 100 days, Barclays points out that these figures include non-energy demand from the refining and petrochemical industries, leading to a degree of overstatement. Analyst Dave Dai noted, "Considering the massive consumption of the petrochemical and refining sectors, South Korea's actual crude oil reserve is approximately four months, while Taiwan's reserves may in fact be approaching a critical point of around two months." The situation is more urgent for liquefied natural gas (LNG). Due to storage technology limitations, LNG buffers are far narrower than for crude oil. Taiwan's nominal LNG reserves are sufficient for only about 11 days, while South Korea's are around 9 days. Barclays calculates that, even accounting for supply diversification, both regions' reliance on Middle Eastern LNG remains as high as 15%-25%. In an extreme scenario of a complete blockade, LNG reserves would buy the power systems a maximum of only about one and a half months.
**Power Resilience Duel: Nuclear Reserves vs. the "Non-Nuclear" Dilemma** The Barclays report reveals a stark contrast in the resilience of the power systems in South Korea and Taiwan when confronting an LNG shortfall. South Korea's power composition is relatively balanced. Facing a 16% shortfall in Middle Eastern gas, the South Korean government plans to increase nuclear power utilization from the current over 60% to 85%-87% (returning to 2015 highs), supplemented by a minor increase in coal power, which could largely offset the impact of an energy supply cut. In contrast, Taiwan faces a structural "vulnerability." With the last nuclear reactor scheduled for retirement by May 2025, Taiwan's power system has completely lost its nuclear energy flexibility. Currently, natural gas power generation accounts for 48% of its total electricity generation (2025 data). "In our scenario assumption, if Middle East LNG supply is disrupted by 24%, Taiwan would need to increase coal-fired power generation by 36% to fill the gap," Dave Dai stated in the report. "While technically feasible, the risk of system collapse during peak summer periods is extremely high given the already weak reserve capacity." Currently, Taiwan's tech industry accounts for 25% of total electricity consumption, with Taiwan Semiconductor Manufacturing alone accounting for 10%.
**The "Precision Pain" of Chip Manufacturing: Power Fluctuations as an Invisible Red Line** For semiconductor manufacturing, which operates at a nanometer level of precision, the stability of power supply is not just a cost issue, but a matter of survival. Barclays notes that semiconductor production must run 24/7 in an uninterrupted vacuum environment. Bum Ki Son emphasized, "Even a momentary power outage or voltage fluctuation can render an entire batch of wafers worthless." If an energy blockade leads to power rationing, policymakers would face a dilemma: Prioritizing residential supply would force factory production cuts, leading to a sharp decline in semiconductor output. Maintaining an unstable supply for industry would directly destroy production yields, significantly reducing the value-added per unit. This risk is not confined locally but possesses cross-regional "contagion." For instance, Taiwan's GPU packaging is highly dependent on high-bandwidth memory (HBM) chips from South Korea. If power fluctuations in Taiwan cause packaging line shutdowns, it would subsequently erode demand for South Korean HBM, creating a domino effect.
**Specialty Gases: The Overlooked Raw Material Storm** Beyond electricity, the Strait of Hormuz is also the sole transit route for critical chemical raw materials used in semiconductors. Barclays data shows that South Korea and Taiwan's reliance on the Middle East and Israel for specialty gases essential for chip etching and cleaning processes is striking: Bromine: 97% of South Korea's demand comes from Israel, with Taiwan's share at 95%. Helium: 55% of South Korea's demand comes from Gulf countries, with Taiwan's share at 69%. Ethylene: Dependence ratios are also between 40% and 60%. Although major producers hold several months of raw material reserves, Barclays warns that if a blockade persists beyond three months, a break in these highly concentrated supply chains would push global semiconductor supply into a genuine "vacuum period."
**Market Consequences: A Dramatic Reshaping of Output and Prices** Researcher Brian Tan warned that the market is currently underestimating the potential damage this conflict could inflict on global technology valuations. He stated, "What Asian policymakers fear most is not just inflation driven by rising oil prices, but an 'Outsized Growth Shock' to semiconductor output. If global semiconductor demand remains robust, this supply-side shock would directly push up nominal chip prices, even as output shrinks." Currently, the Monetary Authority of Singapore (MAS) and the central bank of Malaysia have shown high alertness to geopolitical risks. Brian Tan believes that, as economies deeply intertwined with the technology sector, these central banks will approach interest rate hikes or policy tightening more cautiously to prevent a cascading domestic financial system collapse should external energy risks materialize. For global investors, the Iran conflict is not merely a regional dispute but a stress test targeting the fundamental logic underpinning global computing power. If the Strait blockade is not substantially alleviated in the coming weeks, the semiconductor industry's "black swan" event may transition from speculation to reality.
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