### Potential Supply Chain Disruptions for TSMC The surge in aluminum prices and Alba's delivery suspension have initiated a chain reaction originating from upstream aluminum ingot supplies. As a vital raw material for aluminum heat sinks, supply instability directly constrains heat dissipation module production—essential components in graphics processing units (GPUs), core to TSMC's portfolio. This exerts dual pressures on TSMC: elevated production costs from rising aluminum prices, eroding margins; and delivery delays from supply bottlenecks, undermining global competitiveness. TSMC must thus recalibrate its supply chain strategy to safeguard production continuity and cost control. ### Can Diversification and Buffers Fully Mitigate the Risks? While diversified suppliers, ample inventories, or long-term contracts may temper immediate effects, these safeguards often prove inadequate against entrenched supply chain dependencies and extended disruptions. ### Why Mitigation Falls Short: Evidence from Structure and History Critical aluminum components like heat sinks rely on concentrated midstream production by few specialized manufacturers, forming chokepoints that magnify upstream shortages downstream. Stockpiles and contracts offer short-term respite but deplete under prolonged shocks, necessitating production cuts. Upstream volatility propagates via price spikes and extended lead times, forcing downstream absorption of costs irrespective of precautions. Historical cases affirm this exposure: The 2021 Suez Canal blockage—a logistics parallel to current Hormuz Strait tensions—triggered TSMC production delays and cost surges from cascading semiconductor shortages, akin to today's aluminum constraints. Similarly, 2018 US-China trade tensions curbed rare earths and metals exports, inflating TSMC's GPU heat dissipation costs by over 10%, illustrating geopolitical risk transmission. Here, risks cascade sequentially: Alba's Hormuz-induced halt has propelled aluminum prices to four-year peaks, curtailing ingot availability and compressing midstream heat sink fabricators' margins and output. This flows to heat dissipation module assemblers, extending lead times and raising GPU component prices—where thermal management is paramount for reliability. TSMC, as downstream GPU integrator, faces inevitable impacts, constrained by technical specs and global capacity limits on alternatives. ### Comprehensive Risk Assessment: High Probability Exposure Amid Hormuz Strait tensions and Alba's aluminum delivery suspension, TSMC confronts **significant supply chain risk**. Aluminum ingot bottlenecks—critical for GPU heat sinks—directly impair production, with prices at 2022 highs amplifying costs and margin erosion. Structural chokepoints from limited midstream heat sink makers intensify upstream disruptions downstream. Precedents like the 2021 Suez blockage and 2018 trade frictions highlight semiconductor vulnerability to such geopolitics. Though diversification and buffers may delay impacts, prolonged disruptions overwhelm them, with sourcing alternatives hindered by specs and capacity. Thus, cascading shortages and volatility threaten timelines and costs, yielding a **high-probability risk score of 0.85** for TSMC.