Micron's Last 5 Post-Earnings Dips Turned Into Gains. This Time, the Stock Rose Instead.

Micron Technology (NASDAQ:MU) just posted the biggest quarter yet. In its fiscal fourth quarter of 2026 (the 14-week period ended Sept. 3, 2026), revenue was $54.2 billion, up 379% from the same quarter last year.

Non-GAAP (adjusted) earnings per share rose about 11-fold to $33.42.

And management, pointing to demand fueled by artificial intelligence (AI), forecast about $61.5 billion of revenue for this quarter, which would be another 13% sequential gain.

The stock didn't dip at all. Shares rose 3% on Thursday, the first session after the report.

That breaks a pattern. The stock slid the day after five of Micron's eight reports before this, and all five times, it was up three months later.

And the rise came despite a much bigger spending plan.

Image source: Micron.

The last five dips

I measured each from the close the day after the report to 63 trading days later, or roughly three months.

The December 2024 report was the worst. Shares fell 16% the next day, after management said customer inventory cuts in consumer markets would make its next-quarter shipments lower than it had expected. Three months later, the stock was up about 8% from the post-report close.

The next three did much better. Shares dropped 8% after the March 2025 report and were up 29% three months later. A 1% dip after the June 2025 report turned into a 25% gain, and a 3% loss after the September 2025 report turned into a 71% gain. The fifth, after the March 2026 report, beat them all.

Notably, the stock also got back above its pre-report price in those three months every time.

When the pattern broke

But the pattern isn't a rule. Shares fell 7% the day after the June 2024 report and were 17% lower three months later, never climbing back to their report-day close of roughly $142.

That June 2024 dip, though, followed a big rally. Micron's stock gained around 48% between its March 2024 and June 2024 reports. This time, shares closed on Sept. 30 at about $1,065, within 2% of their close on the day of the June 2026 report.

Gains after a report have a worse record. The stock climbed the day after the other three reports. A 15% pop after the September 2024 report turned into an 18% loss three months later, and a 16% spike after the June 2026 report turned into an 11% loss. Just the 10% gain after the December 2025 report kept going, up another 63%.

What about the bigger spending plan?

I'd have expected spending to weigh on the shares. Micron said it plans to boost capital expenditures for fiscal 2027 versus its earlier plans, mostly for construction to speed up cleanroom space that comes online in late calendar 2028 and beyond. It expects roughly $25 billion of capital spending in its next two quarters, and more after that. That suggests more than $50 billion for the full fiscal year, nearly double the $27.4 billion it spent in fiscal 2026.

Spending like that can make memory investors nervous. More factory space eventually means more supply. And across the five fiscal years before 2026, Micron's DRAM average selling prices swung from annual gains in the low-40% range to annual drops in the high-40% range.

But the March 2026 report could be the closest match in the group. In it, Micron lifted its fiscal 2026 capital spending plan to over $25 billion, up from roughly $20 billion three months earlier, with most of the increase going to cleanroom facilities. It also said construction spending would climb by more than $10 billion in fiscal 2027. Shares dipped about 4% the next day. Three months later, they were up 155%.

The September 2025 report fits, too. Micron said then that fiscal 2026 capital spending would top fiscal 2025's $13.8 billion, and that dip led to the second-largest gain.

And management pointed out on Wednesday's call that new buildings don't automatically mean new chips.

"[W]e will equip the clean rooms and build capacity to the demand trends that we see," said Manish Bhatia, Micron's president and chief operating officer.

Put another way, the two dips that came with bigger spending plans brought the two largest gains, while December 2024's weaker shipment forecast produced the smallest.

Still, five dips are a small sample. And I think the bigger risk to Micron is further out, once the cleanroom space it's paying for starts making chips. At around 6 times its expected fiscal 2027 earnings, the stock already looks priced for those profits to fall eventually.

This time, there wasn't a dip to buy, so the pattern that held five times doesn't apply. And I wouldn't buy Micron based on its post-report record either way.

Daniel Sparks and his clients do not have positions in any of the stocks mentioned. The Motley Fool has positions in and recommends Micron Technology. The Motley Fool has a disclosure policy.