Micron Cracks $1T Club as AI Memory Bumps Walmart Out
Micron (MU) hit a $1 trillion market cap on May 26 while Walmart (WMT) slipped below on May 21. Inside the HBM-led rotation traders are watching now.
Micron (MU) joined the $1 trillion market-cap club for the first time on May 26, while Walmart (WMT) slipped below the same line on May 21. WMT now sits around $945 billion, a quiet but loud sign that 2026's capital rotation is running on a single axis: HBM beats retail.
HBM Is the Real AI Trade
The Street has been calling Nvidia the AI trade, but the bottleneck below the GPU is high-bandwidth memory — and Micron sells it. HBM3E and HBM4 are the gating components for every AI accelerator shipping in 2026, whether it's a Blackwell rack, an MI400 cluster or a hyperscaler's in-house silicon. That's not a cycle story anymore; it's a structural margin story, and the multiple is finally catching up.
Crossing $1T isn't a vibes move. Micron is now priced on a margin profile that two years ago would have screamed "cycle top." The market is telling us those margins are durable.
Walmart's Print Was Fine. The Guide Wasn't.
Walmart's quarter wasn't the problem. Revenue printed at $177.8 billion, up 7.3% YoY, adjusted EPS landed at $0.66 in line with consensus, global e-com ran +26%, and US same-store comped at +4.1%. The damage came from the guide: Q2 EPS guidance of $0.72-$0.74 missed the Street at $0.75, and the full-year midpoint of $2.80 sits below the $2.92 analysts had modeled.
CFO John David Rainey told Yahoo Finance the consumer environment is "a little bit choppy" and called out fuel prices. Not a thesis-breaker — but enough to compress the multiple a notch, and at 7% top-line growth and softer EPS conversion, $1T was always the wrong neighborhood.
What Desks Should Be Watching
Two rotations are running here in parallel: sector (tech over staples) and theme (AI infrastructure over defensive cash-flow compounders). For the current quarter, MU stays the cleanest expression of the HBM trade, with the next earnings print on June 26 as the catalyst to extend. WMT stays a long-duration compounder, but the re-rating waits for a better consumer print or an oil pullback that hands Rainey back the margin story.
For US/UK desks: keep the HBM trio — MU, SK Hynix, Samsung — paired with Nvidia's June 25 print as the directional driver. Short side: pick retail names with soft guides; don't carpet-bomb the sector.