Micron Technology reported results that materially beat expectations, driving a sharp after-hours rally across memory-related names including the recently spun-out Sandisk (SNDK). MU's fiscal-year revenue of $37.4B represents nearly 49% YoY growth, with solid gross margins of 39.8% and diluted EPS of $7.59 — numbers that validate the AI-driven DRAM and NAND demand thesis that has underpinned the memory upcycle narrative.

The earnings catalyst puts MU squarely in focus as the cleanest expression of memory market health. Sandisk, which carries a very different financial profile — 30.1% gross margins but a -22.3% net margin and -$11.32 diluted EPS — is riding the sympathy wave, but its standalone fundamentals are materially weaker and its NAND-heavy exposure introduces different demand dynamics than MU's HBM/DRAM mix.

The looming Fed PCE print is the key macro risk that could cut this rally short. If PCE comes in hotter than expected, rate-sensitive growth and tech names could give back the overnight gains quickly, regardless of MU's fundamental strength. Conversely, a benign inflation print could extend the tech bid and pull forward further multiple expansion for MU.

For MU, the bull case rests on the continuation of AI infrastructure capex driving HBM demand that remains capacity-constrained — a structural tailwind reflected in near-50% revenue growth. The bear case is that memory cycles are notoriously mean-reverting and current pricing may already be peaking, with any capex slowdown from hyperscalers a significant headwind. SNDK's persistent net losses make it a riskier sympathy play — the revenue growth is real but the bottom line remains deeply negative.