Micron Technology has become the third-best performing stock in the S&P 500 this year, but the run-up is stirring familiar worries. The memory-chip maker's shares have surged on expectations that artificial intelligence will drive demand for its products — yet the company operates in a market notorious for boom-and-bust cycles that have punished investors before.
The AI-fueled rally
Investors have piled into Micron as data-center operators and AI startups scramble for high-bandwidth memory, a specialty chip that Micron produces. The company has said its HBM3E memory is sold out for 2024 and most of 2025. That optimism has pushed the stock up more than 70% this year, making it one of the biggest gainers in the index.
But the rally has also pushed Micron's valuation to levels that some analysts find stretched. The stock trades at roughly 4.5 times its estimated sales for the current fiscal year, a multiple that has historically signaled a peak in the memory cycle.
Cyclical headwinds
Micron competes in the DRAM and NAND flash markets, industries where oversupply and price collapses have repeatedly wiped out gains. The last downturn, in 2022-2023, saw Micron's revenue drop by nearly half and the company post a string of quarterly losses. The current upcycle is already showing signs of age: prices for some commodity DRAM chips have started to soften in recent months.
The tension is between a structural growth story — AI's insatiable appetite for memory — and the cyclical reality that memory is a commoditized product where supply catches up fast. Samsung and SK Hynix are also ramping up HBM production, threatening to erode Micron's early lead.
Valuation questions
Micron's forward price-to-earnings ratio is above its five-year average, raising the bar for future earnings beats. If AI demand falters or supply gluts emerge, the stock could correct sharply — as it has in every previous cycle. The company's own guidance for the current quarter came in above Wall Street estimates, but the range left room for uncertainty.
The question investors are wrestling with is whether this time is different. AI workloads require memory in a way that past drivers — smartphones, cloud computing, crypto mining — did not. But memory remains a commodity where margins depend on how much the industry decides to build. Micron's capital spending is expected to rise again next year, a sign that even the company sees the risk of overbuilding.
For now, Micron is riding the AI wave. The next quarterly report, due in late June, will show whether demand is still outpacing supply — or whether the cycle has begun to turn.
