The world's most crowded AI trade is undergoing a severe stress test. The KOSPI (Korea Composite Stock Price Index) experienced its sharpest single-day decline this year on Friday, with AI chip giant SK Hynix Inc plummeting nearly 10% overnight.
The KOSPI now faces a critical test around the 8,000-point level—this zone represents the lower boundary of its rising trend channel, the area of its 21-day moving average, and the point where it broke above previous highs in mid-May. A breach of this support could rapidly transform the global AI rally from the hottest trade into the biggest source of risk.
Data from LSEG Workspace reveals that significant declines in the KOSPI this year have often preceded subsequent pullbacks in the Nasdaq 100 Index (NDX), highlighting a clear and strong correlation. The KOSPI has become the most concentrated and extreme expression of the global AI narrative. As this market begins to falter, global investors are forced to confront a fundamental question: the validity of AI as a long-term theme is not the core debate; the real issue is whether market expectations have run too far, too fast.
For now, the bulls have not been routed. The KOSPI remains above its 21-day moving average, Goldman Sachs maintains an aggressively bullish stance, and earnings estimate revisions continue to trend upward. However, the market is undergoing a genuine trial, the results of which will become clear in the coming days.
The KOSPI's Final Line of Defense
The KOSPI recorded its largest recent single-day drop on Friday. Although the short-term uptrend from the April low has not been technically broken, pressure is mounting.
The 8,000-point level is the most crucial support zone, its importance stemming from the convergence of three factors: it is the lower boundary of the rising trend channel, the current location of the 21-day moving average, and the reference point for the mid-May breakout above prior highs. For the bulls, this area must hold, or the trend will officially reverse. It is noteworthy that the 50-day moving average is positioned significantly lower than the current price; a trend breakdown would open up considerable downside potential.
Simultaneously, the Korea Volatility Index remains at extreme levels. The options market currently implies a daily volatility of approximately 4.5%, indicating that the market has already priced in a significant degree of recent turbulence.
SK Hynix: Gap Risks Loom Large
Finding new superlatives for SK Hynix Inc is becoming increasingly difficult. The stock's nearly 10% plunge on Friday would have been almost unimaginable just weeks ago.
Despite the sharp decline, SK Hynix Inc's share price remains above its rising 21-day moving average, with the 50-day moving average positioned even lower. However, what truly concerns the bulls are the numerous upward price gaps left during the stock's parabolic rise. Markets rarely leave such a high number of gaps unfilled permanently—even a partial retracement could inflict substantial losses on investors who bought near the peak.
The KOSPI's current rally harbors a structural risk that cannot be ignored. According to TS Lombard data, the index's gains have been almost entirely driven by just two companies. This extreme concentration in market capitalization means that pressure on these core holdings would be magnified at the index level, diminishing the practical effectiveness of diversification as a hedge.
The KOSPI-Nasdaq AI Sentiment Link
The KOSPI has become the most aggressive amplifier of the global AI theme. LSEG Workspace data shows that the KOSPI's more substantial declines this year have often triggered synchronous pullbacks in the NDX, demonstrating a highly significant correlation.
The logic behind this transmission effect is clear: fluctuations in global AI sentiment are increasingly signaled in advance by movements in the South Korean market. If the KOSPI breaks below key technical support, investors should remain highly vigilant when assessing other AI-related exposures—turmoil in the Korean market is never just a regional event.
Goldman Sachs Stays Bullish, Raises Target
While the market trembles, Goldman Sachs's stance remains unequivocal. The firm has upgraded Taiwan stocks to overweight and simultaneously raised its target price for the KOSPI to 12,000 points, implying approximately 37% upside from current levels.
Goldman Sachs acknowledges that South Korean equities have more than doubled this year, carrying correction risks, but argues that three factors continue to support the bullish case: ongoing upward earnings revisions, a memory chip cycle tailwind underestimated by the market, and a forward P/E valuation of 8.2x.
The scale of capital chasing the Korean market has become substantial. Extreme levels of positioning and crowding have historically been a key precursor to market inflection points—not because the trend must end, but because any negative shock could trigger a chain reaction of deleveraging.
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