The blistering pace of SK Hynix’s ascent is testing the limits of both markets and regulators. Over the past week, the South Korean chipmaker shipped its latest AI memory samples, saw its stock rocket to a fresh high, and drew a rare public warning from the country’s financial watchdog — all while fighting a two-front war for engineering talent against rivals like Intel.
The Financial Supervisory Service (FSS) stepped in on June 18, flagging leveraged single-stock products linked to SK Hynix and Samsung Electronics. The warning came after the market capitalisation of these products exploded from 450 billion won to 9.6 trillion won in just three weeks from their listing on May 27. Retail investors had piled in, buying a net 8.2 trillion won of the instruments. The FSS highlighted that the SK Hynix leveraged product lost as much as 38% between May 27 and June 12, while the underlying stock dropped 19.1% over the same period. The regulator cautioned that such products can lose roughly twice as much as the base asset in a single day and, due to compounding effects, consistently underperform expected returns over time.
Yet the rally that prompted the warning is deeply rooted in fundamentals. SK Hynix disclosed that it had begun shipping samples of its 12-layer HBM4E high-bandwidth memory chips to key global customers. The next-generation product offers over 20% better efficiency than its predecessor and packs 48 gigabytes of capacity with improved cooling. The announcement propelled the stock nearly 5% on June 18 to a then-record high. Barclays subsequently raised its price targets for both SK Hynix and Samsung, arguing that memory chip supply will remain tight at least through the end of 2027, with AI data centres accounting for virtually all demand growth that year.
The stock closed Friday at 2,764,000 Korean won, up 2.94% on the day, extending its year-to-date gain past 308%. The 52-week low from October 2025 is a distant memory. Technical indicators flash extreme heat: the relative strength index sits at 73.5, the annualised 30-day volatility is 95.93%, and shares trade roughly 59% above their 50-day moving average. The next visible resistance is the 52-week high of 2,891,000 won, reached on June 19.
Should investors sell immediately? Or is it worth buying SK Hynix?
While regulators fret about retail speculation, SK Hynix is waging an aggressive campaign for the engineers needed to sustain its lead. The company, which commands a 58% share of the HBM market, has dropped the mandatory bachelor’s degree requirement for new hires as it seeks hundreds of experienced developers. The application window for the current recruitment drive closes on June 23, and local industry associations have warned that SK Hynix could become a “black hole” for domestic talent.
The talent war took another twist this week with the announcement that former SK Hynix chief Lee Seok-hee has joined Intel to head the advanced packaging division at Intel Foundry. Market watchers expect the move to pave the way for deeper collaboration between the two companies, particularly on HBM logic chips and new interconnect technologies. The defection underscores the intense competition for expertise in advanced packaging, a critical bottleneck in AI chip production.
The combined effect of SK Hynix’s relentless execution and the shifting talent landscape is narrowing the valuation gap with its arch-rival Samsung. For the first time in over a decade, the difference in market capitalisation between the two South Korean chip giants has fallen below 100 trillion won. The next few days will test whether retail investors heed the FSS warning or continue betting on a stock that has already delivered triple-digit returns. Either way, the broader AI-driven demand cycle shows no signs of easing, and SK Hynix is positioning itself to capture every bit of it — with or without a diploma.
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