Micron's HBM4 Certification Couldn't Shield It From a 12% Selloff — Now June 24 Holds the Reckoning

The disconnect between operational momentum and market sentiment is rarely as stark as it is for Micron this week. On Friday, the stock plunged 12.16% to €755.00, wiping out nearly a fifth of its value from the all-time high of €938.70 set just days earlier. Yet beneath the red ink lies a company that has secured a coveted spot in Nvidia's next-generation AI ecosystem and sold out its advanced memory capacity through 2026.

The immediate trigger was not a Micron-specific miss but a sector-wide shakeout. Broadcom's quarterly report landed with a flat AI revenue outlook, prompting a wave of profit-taking across the semiconductor space. As a critical supplier of high-bandwidth memory for AI accelerators, Micron proved especially vulnerable to the sudden shift in risk appetite.

Nvidia's Vera Rubin Validates HBM4 — But Market Share Is Modest

Just hours before the selloff, Nvidia CEO Jensen Huang confirmed that Micron had received certification for its HBM4 memory chips, alongside Samsung and SK Hynix. Those components will power Nvidia's upcoming Vera Rubin platform, set to enter mass production in the third quarter of 2026. The validation is a strategic win — but analysts caution that the volume allocation is far from equal. SK Hynix is expected to command 60–70% of HBM4 output for Vera Rubin, Samsung roughly a third, and Micron will serve the remaining sliver.

Still, the certification reinforces a fundamental reality: demand for Micron's products remains torrid. The company has already sold out its HBM3E and HBM4 capacity for the entire 2026 calendar year, and a significant portion of 2027 output is locked under long-term customer agreements. The memory shortage that fuelled the rally has not evaporated.

Should investors sell immediately? Or is it worth buying Micron?

Technical Picture: Cooled RSI, Intact Trend

The selloff has taken the edge off an overheated rally. The relative strength index has slid to 56.2, exiting overbought territory and settling in neutral ground. That removes one technical headwind, though no clear buy signal has emerged. The 50-day moving average sits at €533.47 and the 200-day at €311.07, both sloping upward and reinforcing a structurally intact primary uptrend.

Yet even after the 12% retreat, Micron trades well above the consensus analyst target of €641.72 — roughly 15% below Friday's close. The gap underscores the extreme valuations the stock commands in the AI boom, leaving little room for disappointment.

Earnings: The $40 Billion Question

All eyes now turn to June 24, when Micron reports results for fiscal Q3 2026. The bar is brutally high. Analysts are modelling revenue of $33.88 billion and earnings per share of $19.29 — a stunning acceleration from just $13.6 billion two quarters ago. The company has beaten expectations eight quarters in a row, most recently crushing the bottom-line consensus in Q2.

The real pivot point will be guidance. If management's forecast for the fourth fiscal quarter breaches the $40 billion revenue threshold, it would provide powerful validation that the AI memory cycle still has room to run. A miss at that level could trigger a painful revaluation, not just for Micron but for the entire chip sector.

Support Levels and the Fed Wild Card

For the near term, the €700 mark is the critical line in the sand. If it fails to hold, the 50-day moving average at €533.47 would come into play for the first time since the AI rally began.

Micron at a turning point? This analysis reveals what investors need to know now.

Complicating matters, the Federal Reserve holds its first meeting under new chairman Warsh on June 17 — one week before Micron's numbers are due. A surprisingly hawkish tone could amplify pressure on richly valued tech names heading into the earnings event.

Micron remains a high-octane bet on the AI buildout, with annualised 30-day volatility running at 101%. Double-digit daily swings are the norm, not the exception. The June 24 report will either confirm that the stock's extreme pricing is justified or open the door to a deeper correction.

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