Update — 3:21 PM CT: Micron reported fiscal fourth-quarter results after Wednesday’s close and delivered another beat-and-raise: adjusted earnings of $33.42 a share on sales of $54.23 billion, ahead of Wall Street’s $31.72 a share and $51.33 billion in sales, with fiscal Q1 guidance of $38.15 a share on $61.5 billion in sales also above consensus, according to Investor’s Business Daily (https://www.investors.com/news/technology/micron-stock-mu-fiscal-q4-2026-earnings/). Despite the beat, the stock barely budged in after-hours trading, a sign of just how high the bar has been set for the AI memory trade.
There is a company in Boise, Idaho, that most people have never thought about, and it is about to report what might be the most consequential earnings of the quarter. Tonight after the market closes, Micron Technology will tell Wall Street how much money it made selling the memory chips that the entire artificial intelligence boom runs on. Analysts expect the answer to be staggering: roughly $51 billion in quarterly revenue, up more than 350% from the same quarter a year ago, and earnings per share near $31.50, up from $3.03. The stock, meanwhile, has nearly quadrupled this year. This is the story of how a cyclical memory maker became the beating heart of the AI trade, and what happens tonight will tell us whether that heart is still strong.
From bust to boom in 18 months
To understand tonight’s numbers, you have to remember where Micron was. Memory chips are the most brutally cyclical business in technology. When supply gluts hit, prices collapse, and even the best-run companies bleed. A year ago, in the fiscal fourth quarter of 2025, Micron reported $11.3 billion in revenue and $3.03 per share in earnings. Respectable, but the trough of the memory downcycle.
Then came the AI infrastructure buildout. Training and running large AI models requires enormous amounts of high-bandwidth memory, the specialized DRAM that sits next to advanced processors like Nvidia’s AI chips in data centers. Demand exploded while supply stayed tight, and prices went vertical. By the fiscal third quarter of 2026, Micron’s revenue had reached $41.46 billion, up from $23.86 billion the prior quarter, with non-GAAP earnings of $25.11 per share and a gross margin of 84.6%, a figure almost unheard of in the memory business. Operating cash flow surged to $25.39 billion, according to previews from IG and AlphaStreet.
Tonight’s consensus, drawn from 33 analysts, sees earnings of $31.56 per share on $51.20 billion in revenue, with estimates ranging from $28.04 to $37.44 on earnings and $46.91 billion to $59.80 billion on revenue. That wide dispersion tells you something important: nobody is quite sure where the ceiling is. Micron itself guided for $50 billion in revenue, plus or minus $1 billion, with non-GAAP gross margin around 86% and adjusted earnings of about $31 per share, plus or minus $1.
The HBM4 gold rush
The single most important word on tonight’s earnings call will be HBM4. That is the latest generation of high-bandwidth memory, the chips that pair with the most advanced AI accelerators. According to industry reports cited by CoinCentral, Micron’s HBM4 supply is reportedly sold out through 2027 and into 2028. Sold out, for two years, before the quarter even closes.
That is what transformed Micron’s economics. In a normal memory cycle, the company sells commodity chips into PCs and smartphones at thin margins. In this cycle, it is selling the scarcest input in the AI supply chain at software-like margins. The 86% gross margin guidance tells the story: Micron is pricing like a monopoly supplier because, for the most advanced memory, it nearly is.
Analysts at UBS recently wrote that they see the gap between memory supply and demand only getting wider heading into 2027, and advised investors to focus on the “durability” of demand, as Investopedia reported. Wells Fargo trimmed its price target to $1,400 from $1,525, but raised its fiscal 2027 and 2028 earnings estimates, which is the analyst equivalent of saying the stock looks expensive but the business looks better. The Street’s consensus is a Strong Buy with an average price target near $1,557, implying roughly 44% upside from current levels around $1,075 to $1,080, per TipRanks.
What to listen for tonight
The numbers will be enormous. The call is where the real information lives. Here is what I will be listening for.
First, memory pricing commentary. The bull case is that HBM pricing stays elevated and conventional DRAM and NAND pricing follows. Any hint that pricing is rolling over, even slightly, would be the first crack in the story.
Second, guidance for fiscal 2027. With the stock up roughly 270% to 280% year to date and the fourth-best performer in the S&P 500 this year, per Yahoo Finance data cited by CoinCentral, the bar is punishing. Management needs to tell a credible story that 2027 revenue can grow on top of this year’s explosion.
Third, capital spending and supply discipline. The memory industry’s oldest sin is building too much capacity at the top of the cycle. Investors will want to hear that Micron is expanding HBM capacity carefully, not flooding the market.
Fourth, any new long-term supply agreements with major customers. Locked-in contracts at today’s prices would de-risk the story considerably.
Options traders are pricing a roughly 7% to 8% move in either direction after the print, which is actually below the average 8.14% swing of Micron’s last four post-earnings reactions. The market expects fireworks, but it has seen this show before.
The lesson for investors
Micron’s year carries a lesson that goes beyond one stock. The AI trade has not been about software companies or chatbots. It has been about the physical layer: the chips, the memory, the power, the concrete. The scarcest inputs command the scarcest margins. That is why a memory maker from Boise is worth more than most of the companies buying its chips.
But scarcity stories have a way of ending the same way. Every memory supercycle in history has eventually met the supply response it created. Tonight’s report will not show the end of this cycle. The question on the call, the one analysts keep circling, is durability. How long can the most cyclical business in tech act like a growth stock? After tonight, we will know a little more.
