What is the KOSPI, and why did it drop 12% today?

The KOSPI is South Korea’s main stock index. It fell about 12% to 5,093 as oil rose, inflation fears returned, and geopolitical headlines hit sentiment. Risk models forced selling, and liquidity thinned. Circuit breakers paused trading to slow panic while regulators signalled a large stabilization plan.

How do circuit breakers affect my orders from Hong Kong?

Circuit breakers pause trading after sharp declines. During halts and restarts, spreads can widen and fills can slip. Market orders risk worse prices. Use limit orders, check margin and collateral, and expect tracking error in Korea-linked instruments until volumes and volatility normalize.

How does the KRW move impact HKD-based returns?

If the won weakens, HKD-based returns on Korean assets can drop even if share prices rise. FX swings may dominate short-term P&L. Consider hedging exposure where possible and compare total costs, including spreads and borrowing. Monitor USDKRW near key levels when sizing positions or setting stops.

Is SK Hynix stock attractive after this selloff?

It depends on risk tolerance and time horizon. SK Hynix is sensitive to memory pricing and AI server demand. Policy support can help, but earnings visibility is key. Seek signs of inventory discipline and stable orders. Use staggered entries and define exits in case volatility persists.

Global Market Insights

KOSPI Today, March 5: 12% Crash; Circuit Breakers, KRW100T Backstop

ByDanny Kontos March 4, 2026March 4, 2026

The KOSPI fell about 12% to 5,093 today, triggering market-wide circuit breakers and shaking risk appetite across Asia. We break down what drove the KOSPI index lower, how regulators signalled a market backstop above KRW100 trillion, and what this means for Hong Kong investors. With oil rising and the won near 1,472 per USD, inflation fears returned to the foreground. We focus on near-term liquidity, sector moves in chipmakers and banks, and practical steps to manage risk from Hong Kong.