South Korean Markets Plunge in 'Black Monday' Sell-off

South Korean stock markets plunged dramatically on June 8, with the benchmark KOSPI index closing down over 8% and the KOSDAQ falling below the 1,000-point threshold for the first time in four months. The day's trading was characterized by a widespread sell-off, leading to the markets being dubbed 'Black Monday'.

The sharp decline was triggered by negative sentiment originating from the US market. A significant drop in US semiconductor stocks and growing expectations of further interest rate hikes by the US Federal Reserve eroded investor confidence. This, combined with the perception that domestic stocks had risen too rapidly in a short period, fueled the sell-off.

Both the KOSPI and KOSDAQ experienced significant drops immediately after the market opened, prompting the activation of circuit breakers and trading halts in both markets. The KOSPI finished the day down 8.29% at 7,484.41 points, while the KOSDAQ plummeted 9.08% to close at 911.39 points.

The won-to-dollar exchange rate also saw volatility, initially rising before falling to 1,535.0 won per dollar by the end of the week, influenced by verbal interventions from South Korean financial authorities.