Chey Tae-won Buys SK Hynix Stock for the First Time Ever

SK Group Chairman Chey Tae-won bought SK Hynix shares on the open market on Thursday, July 30 — the first time in his career he has personally purchased stock in the chipmaker he controls. He acquired 3,620 common shares for roughly 4.8 billion won ($3.35 million), based on the day's closing price of 1.322 million won.

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What Happened

Chey has always held sway over SK Hynix indirectly, through his stake in holding company SK Square. Thursday's purchase marks the first time he's bought the stock directly in his own name. According to multiple Korean outlets including Herald Corp and Hankook Ilbo, SK Group described it as "the maximum amount that can be purchased without a prior disclosure of the trading plan" — a reference to South Korea's capital markets rule requiring executives and major shareholders to file 30 days in advance for any single transaction worth 5 billion won or more. Buying just under that threshold let Chey move immediately rather than telegraphing the trade a month out.

SK Group said the purchase reflects Chey's conviction in the long-term growth of the semiconductor industry and in SK Hynix's underlying value, framing it as a "responsible management" move.

Why It Matters — The Stock Has Been Cut in Half

The timing is the story. SK Hynix hit an all-time intraday high of 2.987 million won on June 25. By Thursday's close, it had fallen to 1.322 million won — a decline of more than 55% in just over a month. That drawdown is part of the broader memory-chip selloff I covered in Micron's Down 31%. History Says the Drawdown Isn't Over Yet, even as SK Hynix itself was posting record margins, a theme from SK Hynix Posted a Record 76% Margin. Micron Fell 22% Anyway. A chairman buying stock with his own money into a 55%+ drawdown is a rare, unambiguous signal — insiders don't have to explain their purchases, but they don't often make first-ever ones at the bottom of a slide.

The immediate market reaction was modest but real: shares pared their losses on Korea's after-hours NXT exchange once news of the purchase broke, according to Edaily's same-day report.

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Who's Affected

The purchase lands squarely in the middle of the memory supercycle narrative that has whipsawed the whole sector this month. SK Hynix, Samsung Electronics, and Micron have all been swinging on shifting readings of AI-driven memory demand versus oversupply fears — the same tension behind Samsung's 2027 Shortage Warning and the volatility in Samsung's Bullish Call Sparked a 5.5% Rally—Kospi Erased It All. Chey's move doesn't change SK Hynix's fundamentals, but it puts a specific dollar figure behind the argument that insiders think the recent selloff has overshot. Micron and Samsung, as SK Hynix's direct HBM and DRAM competitors, remain tied to the same demand cycle and will move on the same headlines, even though neither company's insiders made a comparable trade.

What to Watch Next

• Whether other SK Hynix executives follow. A single chairman's purchase is a data point, not a trend — watch regulatory filings for additional insider buying in the coming weeks.
• The stock's reaction when the regular KRX session opens, since Thursday's move was confined to the smaller after-hours NXT market.
• Whether the 55% pullback from June's record high stabilizes or whether broader memory-sector sentiment — still jumpy on AI demand and oversupply debates — drags SK Hynix down further regardless of the chairman's vote of confidence.

Insider buying at these levels is a genuine signal of conviction, but it's one data point in a stock that's already fallen more than half from its peak in five weeks. This is not financial advice — always do your own research before making investment decisions.