Micron, the memory chip manufacturer based in Boise, Idaho, has won over Wall Street. Whether this romance lasts will largely hinge on how long the AI-driven shortage of memory chips continues. The company insists it has fortified its position for the long haul, enabling it to weather a sudden drop in demand or an oversupply of chips. Wall Street has bought into this vision, briefly pushing Micron's market valuation past Meta and Tesla for the first time on Thursday, though it slipped back by Friday to nearly match them. Specifically, Micron closed Friday's trading with a market cap close to $1.27 trillion, while Meta stood at $1.39 trillion and Tesla at $1.42 trillion. Micron's stock has surged over 236% in the past month alone, closing Friday at $1,132 per share. In contrast, it languished below $100 per share for years before mid-2025. This is a dizzying ascent for a company most consumers associate with the tiny memory cards once needed to boost storage in PCs, smartphones, or other devices.

Wall Street isn't concerned about that product line. Micron is riding the wave of the AI data center expansion boom, which has created a shortage of system memory chips—both DRAM and NAND, which Micron produces—particularly High-Bandwidth Memory (HBM). A single AI server requires far more memory than a laptop. AI system makers like Nvidia, along with hyperscalers building their own systems, are buying up vast quantities of memory. This includes Microsoft, Amazon AWS, Google, Meta, and Oracle. This frenzy is forcing other companies that need memory, from PC makers like Dell and HP to various device manufacturers, to hoard it as well. This supply shortage, dubbed "RAMageddon," is expected to persist into 2027 and is already driving up prices for consumer electronics like Apple products and Xbox consoles.

With the entire tech industry clamoring for more memory, Micron delivered blockbuster third-quarter earnings last week. Revenue quadrupled year-over-year to $41.45 billion, and profits skyrocketed from $1.88 billion to $28.2 billion over the same period. Micron also provided an optimistic forecast, projecting fourth-quarter revenue between $49 billion and $51 billion. Wall Street, eager to find more publicly traded AI-related companies that might perform as well as Nvidia, has grown even more enamored.

The historic challenge for memory chip makers like Micron and Samsung is that building manufacturing facilities to increase capacity is a time-consuming and costly endeavor. Demand often drops just as companies ramp up capacity, leading to a glut and subsequent price declines. Micron has gotten ahead of any AI bust chatter by highlighting a series of long-term supply agreements, including deals with Nvidia and AI lab Anthropic, which would presumably protect it. In its earnings presentation, the company said it has signed 16 strategic customer agreements across the data center, consumer, and auto market segments, which it expects to fundamentally transform its business model. This seemed to convince several analysts that the company could be another long-term, profitable investment.

In a research note, William Blair tech analyst Sebastien Naji noted that demand growth continues to outpace the rate at which new cleanroom space can come online. "Given the strong likelihood of continued ASP growth in the coming quarters and improving revenue visibility thanks to a rapidly expanding set of long-term agreements (SCAs) with key customers, we see potential for more durable earnings growth and reiterate our Outperform rating," Naji wrote. Whether Micron can truly sustain itself long-term without a bust cycle remains to be seen. But for a brief moment on Thursday, this U.S. company was more valuable than some of the industry's giants.