By Jared Blikre

The AI memory scare ran straight into Micron's profit machine on Wednesday, sending its stock soaring.

Micron (MU) and SK Hynix (000660.KS) had been two of the cleanest ways to trade the AI memory boom this year, both crushing the broader chip index before this week's sell-off.

But on Tuesday, the Philadelphia Semiconductor Index (^SOX) had its second-worst day of the past year, while Micron had its worst day since the depths of the "Liberation Day" sell-off in April 2025.

Then Micron answered.

The company posted record revenue, record gross margin, and record earnings for Q3, then said it has signed 16 strategic customer agreements designed to lock in supply over several years. For a business known for boom-and-bust swings, that is the bigger story. AI customers are not just buying more memory — they are trying to secure access to it.

Shares in Micron jumped around 17% in premarket trading on Thursday, as investors assessed the report.

The quarter itself was a blowout. Micron topped Wall Street's estimates and offered a stronger-than-expected outlook.

Revenue hit $41.5 billion, well above expectations. Adjusted earnings came in at $25.11 per share. Gross margin reached 84.9%, topping estimates and more than doubling from a year ago.

That last number is the key.

Company reports, Bloomberg, Yahoo Finance analysis

Gross margin shows how much of each sales dollar Micron keeps after making its chips. Micron is now keeping more of each sales dollar than at any point in data going back to 1990.

The company expects that figure to rise again this quarter, to about 86%.

That does not look like a memory market cracking. It looks like one still stretched by AI demand.

AI chips need memory that's nearby, fast, and supplied in huge quantities. Micron said AI system performance depends on memory performance and capacity, turning memory into a strategic asset rather than a commodity afterthought.

That is where the customer agreements matter.

Micron said the 16 deals include take-or-pay commitments — meaning customers commit to buying set volumes or paying anyway — and typically run for several years. Fourteen of them represent about $100 billion of minimum contracted revenue over the remaining term, with $22 billion of cash deposits and related commitments.

For investors, the lesson is that AI customers are treating memory like a bottleneck they cannot afford to leave to chance.

Jared Blikre is the global markets and data editor for Yahoo Finance. Follow him on X at @SPYJared or email him at jaredblikre@yahooinc.com.

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