South Korea Supply Chain Exposure Widens as Iran Conflict Disrupts Petrochemicals, Semiconductors
South Korea's petrochemical and semiconductor supply chains depend on Middle East energy at a moment when the US has deployed 50,000+ troops to the region and Iran has closed the Strait of Hormuz.
If Hormuz remains closed beyond 30 days, Korean semiconductor fabs (which consume ~8-10% of global industrial power) will face rolling production cuts unless Seoul secures alternative LNG or activates strategic petroleum reserves — either action signals to Beijing and Moscow that energy security, not market forces, now drives allied industrial policy.
South Korea is heavily exposed to two mechanisms now in play: (1) LNG supply — Ras Laffan (20% of global supply) was struck on March 19; South Korea imports ~30% of LNG from Qatar and the broader Middle East, making energy cost inflation immediate. (2) Petrochemical feedstock — Iran supplied ~15% of South Korea's naphtha imports pre-conflict; combined with Hormuz closure (blocking ~30% of global oil transit), Korean refiners and chemical exporters face input cost shocks that compress margins on semiconductors, batteries, and automotive components.
Stock market impact reflects real capital reallocation away from export-dependent sectors. The constraint is not speculation — it is realized disruption of a chokepoint supply line.
The article does not specify which South Korean firms are most exposed (Samsung, SK Hynix, Hyundai, LG Chem, Hanwha), what percentage of their input costs derive from Middle East energy, or whether Seoul has activated strategic reserves or negotiated alternative LNG contracts.
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