No Meltdown In Memory

The last three trading sessions in memory chips looked like a crisis if you only watched the tape. South Korea’s market tripped circuit breakers twice. Samsung and SK Hynix each fell more than 12 percent in a single session. Micron had its worst day in over a year. Then, just as fast as it fell, it all reversed. The real story is less about a cracking thesis and more about how much leverage had built up around it.

Monday set the stage. SK Hynix closed up 5.6 percent and overtook Samsung as Korea’s most valuable listed company, a repricing that reflected its roughly 61 percent share of the global high-bandwidth memory market, the chips feeding the AI buildout. Capital agreed, with tech funds pulling in a record $21.46 billion that week.

Tuesday is where things broke, but not where you’d expect. South Korea’s financial regulator warned about sixteen leveraged ETFs that had pulled in $9 billion in just weeks betting on Samsung and SK Hynix. That warning alone triggered a fast unwind: the KOSPI fell roughly 10 percent, both stocks dropped more than 12 percent, and the selling crossed the Pacific, with Micron falling over 13 percent. None of this touched HBM demand or order books. It was speculative leverage coming off a crowded trade once a regulator pointed at it.

Wednesday proved the point. Samsung buyback rumors and SK Hynix accelerating a $26 billion US listing sparked a sharp recovery in Seoul. Then Micron reported earnings after the close: revenue went up 346 percent year over year, far ahead of estimates, with data center revenue up roughly sevenfold. The stock jumped nearly 14 percent.

Memory remains a cyclical business, and oversupply risk heading into 2027 is worth watching as all three companies race to expand capacity. But that risk didn’t show up this week. What showed up was leverage getting flushed out fast, followed by fundamentals reasserting themselves just as fast. Worth knowing the difference before reacting to either the 13 percent drop or the 14 percent rip.

This material is provided for informational purposes and reflects market conditions as of June 24, 2026. It is not investment advice.