South Korea stocks are collapsing at a pace not seen in over 15 years. The KOSPI stock index fell as much as 10% on Wednesday, just a day after sliding 7.2% — and that puts the two-day loss on track for the worst such stretch since 2008. Both the KOSPI and Kosdaq hit the 8% circuit breaker threshold, triggering a 20-minute trading halt. The South Korea stock market today points to a full reversal of the gains built over the past year, and at the time of writing, South Korea stocks show no clear floor.
South Korea Stock Market Today Faces KOSPI Crash
What’s Driving South Korea Stocks Lower
South Korea stocks had been on a remarkable run — the stock market soared more than 75% over the past year, fueled by insatiable demand for memory chips. Samsung Electronics and SK Hynix led that rally, and right now those two names are also leading the selloff. Samsung fell over 9% Wednesday, and SK Hynix dropped more than 6%. Together, they make up almost 50% of the KOSPI stock index, according to Morningstar data, so when those names move sharply, the whole market moves with them.
Lorraine Tan, Asia director of equity research at Morningstar, stated:
“The decline in the KOSPI can broadly be attributable to the single-name concentration that we see in the Korean markets. We believe that the drop in share prices is partly driven by profit taking after a strong runup amidst a risk-off environment but also implies growing concern that the AI datacenter adoption pace might slow due to its significantly higher energy costs than regular data centers.”
Oil prices are also making things harder. South Korea ranks as the world’s eighth-largest crude consumer, and the escalating Iran conflict — including moves to close the Strait of Hormuz — hit the country’s manufacturing-heavy economy hard. South Korea stocks have always been sensitive to energy price swings, and right now those swings are unusually sharp. Japan’s Nikkei also fell nearly 4% and Hong Kong’s Hang Seng dropped over 2.9%, adding extra regional pressure on the South Korea stock market today.
Source: CNBC
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Margin Calls Are Making the South Korea Crash Worse
A big chunk of the South Korea crash traces back to forced selling. Retail investors borrowed heavily to ride the rally, many putting down just 30–40% as a margin deposit. As the market turned, those positions started unwinding fast, and local brokers began pulling margin services during Wednesday’s session.
Kim Dojoon, chief executive and investment officer at Seoul-based Zian Investment Management, said:
“There’s been a lot of buying on credit, especially those heavyweight stocks, with investors putting down only 30%-40% in margin deposit. If there’s another drop tomorrow, nobody will catch a falling knife.”
Foreign funds also sold more than 1 trillion won worth of South Korea stocks in Wednesday’s morning session alone. Retail buying — which had kept the stock market from sliding even harder early in the day — faded through the afternoon, and the KOSPI stock index’s volatility gauge hit its highest reading since March 2020.
Source: CNBC
Shawn Oh, an equity trader at NH Investment & Securities in Seoul, said:
“Local brokers started halting providing margin and we’re seeing retail buy-the-dip much weaker today. We might see further weakness during the last hour of trading due to fears of margin call.”
Dave Mazza, chief executive officer at Roundhill Investments, had this to say:
“This reads like a positioning unwind more than a Korea-specific fundamental break. When global risk appetite turns and energy and foreign exchange volatility jump, you get fast de-risking in the biggest, most liquid index names.”
What Comes Next for the South Korea Stock Market
South Korean authorities activated contingency plans, including a market stabilization fund of over 100 trillion won ($68 billion). South Korea stocks in defense and energy bucked the broader selloff — LIG Nex1 gained ground, and refinery S-Oil Corp. rose as much as 25%. Those pockets of strength do little to offset the scale of the South Korea crash, though, and the stock market today still looks fragile heading into the next session.
An Hyungjin, CEO at Billionfold Asset Management, summed up the mood on trading floors across Seoul:
“Moves are too extreme so forecasting feels almost impossible — analysis doesn’t really help. Retail investors seem to hesitate as well, bids are fading since yesterday. While we’re picking quality names and hedging, this isn’t a clear opportunity.”
