Warning! Iran is just the fuse, the sharp drop in the South Korean stock market is the "time bomb" for the global market.

When the global spotlight was tightly focused on the situation in Iran, the South Korean composite stock price index (KOSPI) plummeted by 20% in just two trading days. As a barometer of the South Korean stock market, the sharp fluctuations of this index are of great significance to American investors. South Korea is at the core of the artificial intelligence (AI) hardware ecosystem, and as speculative positions in this sector accelerate their unwinding, the shockwaves could quickly spread to Western markets. So, should investors be worried at this moment, or should they see it as a good opportunity to buy South Korean stocks at a low point? Events recap The selling wave began with the South Korean KOSPI index plummeting by more than 7% in a single day, and the following day saw another drop of 12%. The drastic fluctuations triggered circuit breakers, leading to multiple trading suspensions. Data speaks volumes: in the previous year, prices of South Korean stocks represented by the iShares MSCI ETF (EWY.US) had more than doubled. Behind this surge were the AI hardware giants like Samsung Electronics and SK Hynix that hold significant weight in the index. And it is these stocks that led the decline this time. So, what ignited this selling storm? Trade economist James Foord believes that there were two core triggers for this round of selling: energy exposure risk and leverage fund stampede. Energy impact South Korea has every reason to be seen as one of the most technologically advanced countries in the world. However, technology is not omnipotent, and South Korea has almost zero domestic energy production. In fact, South Korea is one of the world's largest importers of oil and liquefied natural gas (LNG). This is undoubtedly a fatal weakness in its economic structure. South Korea's industry is extremely sensitive to energy market price fluctuations and finds it difficult to find effective hedging methods in the short term. With the escalation of the Middle East conflict, Asian LNG prices soared to $25.40 per million British thermal units within a week, doubling in a short period. At the same time, one of South Korea's major suppliers, Qatar, suspended some of its production, further exacerbating the supply tightness. For a country whose economic lifeline depends entirely on exports of manufactured goods, this is undoubtedly a heavy blow. Rising energy prices will continue to erode business profits and may even lead to currency depreciation. This has forced investors to reassess their positions in South Korea, and this was likely the starting point for this round of selling. Leverage crisis However, the real catalyst that ignited the situation was leverage. Foord pointed out that South Korea has one of the most aggressive retail investment cultures in the world. In recent years, the balance of financing in its stock market has soared, reaching about 32 trillion Korean won (about $220 billion) earlier this year. Driven by the strength of chip stocks, this leveraged trading model had been successful multiple times, attracting more leveraged funds to enter, creating a self-reinforcing cycle. However, when a market is filled with crowded leverage trades, any slight market movement can trigger a massive sell-off. This is exactly what is happening now. Once the first margin call notifications were issued, it triggered a chain of forced liquidation, and the selling frenzy became uncontrollable. Why it affects the US market At first glance, the collapse of the South Korean stock market may seem like a regional issue. However, for those who have closely followed trends in the investment world for the past two years, the spillover effects are obvious. South Korea is a key link in the global semiconductor supply chain, and its companies provide core components to almost all major AI infrastructure manufacturers. This directly impacts a long list of companies in the US stock market: chip manufacturers like NVIDIA Corporation (NVDA.US) and AMD (AMD.US) are at the forefront; other tech giants like Apple Inc. (AAPL.US) and even Microsoft Corporation (MSFT.US) may also suffer from disruptions in the supply chain. In this tech-dominated era, it may be more difficult to list US companies that are completely unaffected by interruptions in the South Korean supply chain. South Korean companies support the underlying supply of many US tech giants, and these giants have a significant weight in the S&P 500 index. In addition, South Korean investors hold a large number of positions in global stock markets, especially in US tech stocks. If they face additional margin pressure domestically, they may be forced to sell overseas assets for cash. This is reminiscent of the Japanese arbitrage trading unwinding shock that shook the US market last year. In fact, the current trends in the South Korean, Japanese, and US stock markets already show a high degree of correlation. Energy is the key From a broader perspective, the deep logic behind this event is not so much focused on South Korea itself, but rather on energy. Foord emphasizes that industrial powerhouses like South Korea are particularly sensitive to energy price shocks. If oil and gas prices continue to soar, it will trigger a series of chain reactions: rising production costs, weakening currency, shrinking profit margins, and ultimately leading to systemic hedging in the stock market. This is the script that is currently unfolding in the market. What investors should focus on next The ultimate outcome of the situation depends on the evolution of energy prices, which in turn depends on the duration of the GEO Group Inc conflict. Fundamentally, the bullish logic remains strong. The AI development cycle is far from over, and demand for storage chips remains strong. As leveraged funds and over-speculative positions are cleared out, Foord believes that the current situation may be a good opportunity to buy low and wait for a turnaround. However, if the selling frenzy continues unabated, its ripple effects may extend far beyond Seoul.