KOSPI Remains Volatile After 30% Drop From June Peak
Key Takeaways
- •The KOSPI fell about 30% from its June peak in less than a month before remaining highly volatile.
- •The decline reportedly caused margin calls across roughly 1.2 million trading accounts, with about 360,000 fully liquidated.
- •Concerns about slower AI-related spending pressured Samsung Electronics and SK Hynix.
- •South Korea’s equity market is highly exposed to the semiconductor supply chain, making broader sentiment sensitive to chip demand expectations.
- •The index is still around 25% below its June high, with recent session swings of about 5% to 6%.

South Korea’s benchmark KOSPI stock index remains volatile after falling about 30% from its June peak in less than a month.
The decline reportedly triggered margin calls across roughly 1.2 million trading accounts, with about 360,000 accounts fully liquidated. Margin calls occur when brokers require investors to add funds or securities after leveraged positions lose value, and forced liquidations can add further pressure to declining markets.
Concerns about a slowdown in artificial intelligence-related spending weighed heavily on major South Korean chipmakers Samsung Electronics and SK Hynix. Because South Korea’s equity market has significant exposure to the semiconductor supply chain, shifts in expectations for AI-related demand can quickly affect broader market sentiment.
The KOSPI is still moving sharply, with session swings of about 5% to 6%. The index remains approximately 25% below its June high, keeping attention on whether selling pressure tied to leverage and chip-sector weakness continues to ease or reappears in future sessions.