South Korea’s KOSPI is churning out record trading volumes, but a startling divergence is playing out beneath the surface: foreign investors are dumping the country’s two largest semiconductor names at a pace rarely seen, while domestic retail buyers and a wave of new leveraged products are scrambling to fill the gap. At the center of this tug-of-war sits SK Hynix, a stock that has managed to cling just inches from its 52-week high despite a $19.5 trillion (roughly $14.6 billion) foreign selloff over twelve consecutive trading days through May 22.
The scale of the exodus is staggering. Between May 7 and May 22, net foreign selling in the KOSPI main board totaled 46.34 trillion won, with SK Hynix alone accounting for 19.53 trillion won and Samsung Electronics contributing another 18.87 trillion won. Together, the two chip giants represented 82.9% of all foreign outflows during that stretch. In the final week ending May 22, the pair accounted for 73% of net foreign selling on the main board — 10.59 trillion won in combined outflows. Yet the broader index has barely flinched: the KOSPI closed at 7,847.71 points on May 22, up 19% from the end of April, and briefly touched 8,000 points on May 15.
The selling, analysts argue, is less about a loss of faith in the semiconductor supercycle and more about tactical repositioning. Kang Jin-hyuk of Shinhan Securities describes the move as portfolio rebalancing, with foreign money rotating into sectors such as AI infrastructure, robotics, and energy storage. In the week to May 22, Doosan Robotics attracted net inflows of 370 billion won and Samsung SDI drew 148.9 billion won; for the full month of May, those figures widened to 676.1 billion won and 380.8 billion won, respectively. The vacuum on the sell side has been filled by Korean retail investors, who bought over 39 trillion won of equities in May — equivalent to roughly $25.8 billion — providing a crucial support beam for the market.
What makes the foreign exit all the more striking is the strength of the underlying business. SK Hynix reported a record quarterly revenue of 52.576 trillion won for the first quarter, along with an operating profit of 37.610 trillion won and net income of 40.346 trillion won, powered by insatiable demand for AI-driven memory such as HBM, server DRAM, and enterprise SSDs. The balance sheet has never been healthier: cash and equivalents stood at 54.3 trillion won, up 19.4 trillion won from the prior quarter, while interest-bearing debt fell 2.9 trillion won to 19.3 trillion won, leaving a net cash position of 35 trillion won. The company plans to ramp capital spending in 2026 for facilities like the M15X fab, the Yongin cluster, and advanced EUV equipment.
Should investors sell immediately? Or is it worth buying SK Hynix?
None of that fundamental strength has prevented the stock from looking technically stretched. SK Hynix closed at 1,941,000 won on May 22, up 5.49% on the week and 58.84% over the past month. Its year-to-date gain now stands at 186.7%, leaving it just 1.77% shy of the 52-week high of 1,976,000 won. The relative strength index sits at 68.9, and the 30-day annualized volatility has hit 75.52%, a level that typically invites caution. The semiconductor industry’s business outlook index for June, however, came in at 156 — far above the manufacturing sector average of 107 — suggesting the demand tailwind remains firmly intact.
Adding another layer of complexity, eight asset managers are set to launch 16 single-stock leveraged ETFs and two ETNs on SK Hynix and Samsung Electronics at the Korea Exchange on May 27. These products aim to deliver twice the daily return of the underlying shares and could generate net inflows of up to 5.3 trillion won, according to market estimates. But regulators are preparing for the volatility they bring: traders will be required to complete mandatory training and post a minimum deposit of 10 million won, with warnings that daily losses of up to 60% are possible. The instruments will amplify intraday swings, particularly for a stock already trading near record levels and heavily influenced by foreign capital flows.
For now, SK Hynix remains caught between two powerful currents. The foreign selling is real and concentrated, but it is being offset by domestic buying and an extraordinarily strong earnings base. The introduction of leveraged products could either absorb selling pressure or add fuel to short-term gyrations. Over the coming weeks, the direction of foreign flows will be the single most watched indicator. Should the outflow narrow, the technical backdrop — a stock that has absorbed a $19.5 trillion selloff without breaking down — argues for a consolidation phase rather than a deeper correction. If selling intensifies, the company’s record margins and net cash position provide a cushion that few other high-flying names can offer.
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