South Korea's KOSPI falls more than 5% as SK Hynix shares slump 10% on earnings outlook cut
South Korea's KOSPI stock index dropped more than 5 percent in Monday morning trading on July 13 as SK Hynix shares fell around 10 percent following a cut to the chipmaker's earnings outlook; The Asia Business Daily attributed the drop to renewed investor concern about the US-Iran conflict weighing on risk appetite, alongside the earnings revision, after SK Hynix completed a record-setting Nasdaq debut on July 10
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Summary
South Korea's KOSPI stock index fell more than 5 percent on Monday morning, July 13, with SK Hynix shares dropping around 10 percent after analysts cut the chipmaker's earnings outlook. The Asia Business Daily cited two concurrent drivers: a downward revision to SK Hynix earnings expectations, and renewed investor risk-off behaviour tied to US-Iran war escalation concerns. The selloff came three trading days after SK Hynix completed a record US$26.5 billion Nasdaq dual-listing on July 10, during which its Seoul-listed shares had already eased as capital shifted to the US-listed shares.
Why it matters
SK Hynix is South Korea's second-largest company by market capitalisation and one of only two makers of high-bandwidth memory (HBM) chips used in Nvidia AI accelerators, making its KOSPI trajectory a proxy for global AI infrastructure confidence. A 5 percent KOSPI drop is a significant single-session move for one of Asia's major indexes. The divergence between the successful Nasdaq listing and the Seoul selloff reflects how geopolitical risk (Iran-war inflation fears) and domestic earnings revision pressure can override sector-level AI demand fundamentals in a single session.
What to watch
- SK Hynix's own earnings release and guidance, which will confirm or revise the analyst outlook cut.
- KOSPI recovery or continued pressure as the US-Iran situation develops.
- Whether the Nasdaq-listed SK Hynix ADRs hold value even as Seoul shares decline, and whether that arbitrage normalises.