SK Hynix Bounces 10% as Korean Markets Claw Back From Historic Iran-War Crash

What Happened

The setup matters. KOSPI had been one of the best-performing major indices on the planet in 2026, up over 40% year-to-date heading into March, powered by an AI-driven memory supercycle that sent SK Hynix up over 350% in twelve months. Bank of America had called the memory market a "supercycle similar to the boom of the 1990s", and SK Hynix was their global top pick.

Then the floor dropped out. The US-Israeli strikes on Iran beginning February 28 — Operation Roaring Lion and Operation Epic Fury — sent oil surging and triggered a historic selloff in South Korean equities. KOSPI cratered 7.2% on Tuesday March 3 and then 12.06% on Wednesday March 4, the single worst trading day in the index's history — worse than 9/11, worse than 2008. Circuit breakers kicked in after the 8% threshold, halting trading for 20 minutes. SK Hynix dropped roughly 10% across the two sessions. Leveraged positions were obliterated, and margin calls cascaded through the Korean brokerage system.

Shipping and logistics stocks got hit even harder — Pan Ocean, HMM, and KSS Line plunged 16-17% — but the semiconductor heavyweights carried the index weight.

Why It Moved

South Korea is uniquely exposed to a Middle East war. The country imports approximately 98% of its fossil fuels, with about 70% of crude coming from the Persian Gulf through the Strait of Hormuz — the same chokepoint Iran threatened to blockade. An energy shock doesn't just raise input costs for Korean manufacturers; it threatens the entire export-driven economy.

But the March 5 rebound wasn't about fundamentals improving. It was about the panic subsiding, at least temporarily. US equities stabilized overnight on March 4, and Wall Street's relative calm signaled that the Iran conflict might stay contained rather than spiraling into a full Hormuz blockade scenario. Samsung surged 11% — its biggest daily gain in 17 years — and SK Hynix jumped over 9%, with foreign and institutional investors becoming massive net buyers.

The structural bull case hasn't changed. Morgan Stanley forecasts 2026 DRAM prices rising 62% and NAND 75% year-over-year. SK Hynix's HBM (high-bandwidth memory) dominance for Nvidia's AI accelerators remains intact. JP Morgan sees 45-50% further upside for both SK Hynix and Samsung in 2026. What happened this week was a geopolitical liquidation event, not a fundamental deterioration.

What to Watch

The Strait of Hormuz is the single variable that matters most. If Iran follows through on threats to blockade it, Korean equities face another leg down — analysts have flagged a 20-30% KOSPI decline as possible in that scenario. Watch Brent crude: if it settles back below $85, the recovery trade has legs. If it keeps climbing, expect renewed selling.

On the company level, SK Hynix's Q1 2026 earnings forecast remains robust, with tight HBM supply and strong AI demand. The company also recently announced a $15 billion investment in new semiconductor facilities in South Korea. Geopolitics aside, the memory cycle is still running hot.

Korean regulators have activated trading curbs for two consecutive sessions. If volatility continues, expect further intervention — potentially short-selling restrictions or additional circuit breaker adjustments.

Note that the SKHX perp on Hyperliquid converts the underlying KRW-denominated stock price to USD via the prevailing USD/KRW FX rate. The Korean won hit a 17-year low against the dollar during this sell-off, which amplifies losses for USD-denominated tracking.

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