Micron Technology, Inc. (MU) has been one of the biggest winners of the artificial intelligence boom, but investors are increasingly debating how long its record margins and explosive growth can last.

Nancy Tengler, CEO and CIO of Laffer Tengler Investments, believes they are looking at the wrong precedent. Instead of comparing Micron to past memory cycles, she points to Microsoft Corp's (MSFT) Azure business as a better framework for understanding what comes next.

Azure's Playbook

Tengler acknowledged that Micron's industry-leading margins may not remain at current levels, but argued that margin normalization shouldn't automatically be viewed as a warning sign.

"Am I concerned that margins could go down to 70%?" Tengler asked. "The market will hate it, but this is what happened with Microsoft during the launch and momentum of Azure. There was a time when Azure was growing at 92%, and the stock continued to outperform for a number of years even after growth began decelerating. That's the law of large numbers."

The comparison is less about Microsoft's cloud business and more about how investors tend to react when hypergrowth inevitably slows.

As businesses scale, maintaining triple-digit growth or record profitability becomes mathematically harder. Markets often interpret that slowdown as the beginning of the end, even when the underlying business continues to strengthen.

Tengler argues Micron could be entering a similar phase.

Why Micron's Story May Be Different This Time

The portfolio manager also pointed to another development she believes investors shouldn't overlook. "I don't view it too seriously when I look at a company like Micron, which is now signing three-year contracts and has margins of 84%," she said.

For decades, memory stocks have been known for sharp boom-and-bust cycles driven by supply gluts and volatile pricing. Multi-year supply agreements with AI customers could signal a more durable demand environment, reducing some of the earnings volatility that has historically defined the industry.

That doesn't mean Micron is immune to cyclical pressures. Instead, Tengler believes investors should focus less on whether margins retreat from today's extraordinary levels and more on whether AI demand continues to create a structurally larger market for high-bandwidth memory and advanced DRAM products.

Looking Beyond The Next Quarter

Tengler also pushed back against concerns surrounding heavy AI investment across the technology sector, arguing that capital spending funded by strong cash generation should be viewed differently than debt-driven expansion. "I think capex spending is a sign of strength... you still have some of these mega-cap companies generating tens of billions of dollars in free cash flow every year, even after spending tens of billions of dollars."

That philosophy extends to Micron.

Rather than chasing the stock after its recent run, Tengler said volatility should be expected during what she described as the "fourth industrial revolution." "I think you use it as an opportunity if you're a long-term believer... I'm not going to chase it here, but if it continues to decline, we will, in fact, step in."

Her broader message is that investors may be asking the wrong question. Instead of trying to pinpoint when Micron's margins peak, Tengler suggests looking at how other transformative AI businesses have evolved. If Microsoft's Azure story is any guide, slowing growth and moderating margins may be less a sign of fading momentum than the natural price of becoming much bigger.