KOSPI crashes 8% to below 5,000, Nikkei plunges 5% as US elections trigger AI rout; Samsung, SK Hynix sink

The headline reports that Korea's KOSPI index fell roughly 8% to below the 5,000 level, Japan's Nikkei dropped about 5%, and shares of Samsung Electronics and SK Hynix declined sharply, with the selloff attributed to US election developments triggering an AI-related rout. The transmission channel appears to run through risk appetite and the valuation of AI-linked semiconductor earnings, since memory chipmakers are heavily exposed to global AI hardware demand and any perceived policy shift affecting that demand or trade relations can rapidly reprice expected cash flows. Korean equities are especially exposed because semiconductors constitute a large share of the KOSPI's market capitalization, so the index's drawdown reflects concentrated positioning in Samsung and SK Hynix rather than a broad-based decline. Japanese equities, with their own large exposure to chip-equipment and AI-supply-chain names, are transmitting the same risk-off pressure, while yen and won moves would determine how far the losses are cushioned for foreign investors. Traders should watch the next US policy signals on semiconductor export controls and tariffs, along with Korean

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