AI Chip Selloff Deepens: Samsung and SK Hynix Trigger Kospi Trading Halt as Investors Dump Chipmakers

The Quick Take

• Samsung and SK Hynix shares continued sliding, extending the AI chipmaker selloff to its worst multi-day stretch of 2026
• The Kospi triggered an automatic trading halt as circuit breakers activated on the scale of the sector decline
• The Financial Times flags deepening institutional investor skepticism about AI hardware valuations across global markets

The Financial Times' coverage of the AI chip selloff's deepening marks a shift from financial-media framing of the correction as a 'buying dip' toward a more structural narrative about semiconductor valuations in the AI era. A Kospi circuit-breaker activation — requiring a temporary trading suspension — is not a routine event; it signals the kind of extreme single-day price movement that reflects systematic institutional repositioning rather than retail panic, suggesting this selloff has characteristics beyond ordinary sector rotation.

A circuit-breaker halt creates multiple cascading effects: it forces a recalibration moment for investors who had been buying the dip, crystallizes unrealized losses for funds with mark-to-market exposure, and amplifies momentum in both directions once trading resumes. Global technology ETFs with Korean holdings — including those tracking the MSCI Emerging Markets Technology index — face forced rebalancing pressure at the next available trading opportunity, compounding the selling pressure independently of whether fundamental views have changed.

The next key indicator is whether circuit-breaker events repeat in following sessions, which would indicate persistent forced selling rather than a single-session extreme. The recovery pattern after Kospi halts historically takes two to five trading sessions to normalize, with institutional buying returning only after clear signals from the underlying semiconductor demand cycle emerge. The macro variable is the Fed rate decision this week — a hawkish outcome would add a second macro shock on top of the sector-specific selloff, potentially extending the correction beyond what chip fundamentals alone would justify.

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