Sandisk shares have risen more than 520 percent this year through August 28, making it the best-performing stock in the S&P 500, while Micron has climbed roughly 225 percent to rank fourth. An investment analysis published August 30 argues that Micron is the clearer buy despite Sandisk's stronger price run, citing broader product exposure, earlier capacity expansion, and a lower earnings multiple.

The supply backdrop

Both companies fabricate memory chips and both are effectively sold out across NAND and DRAM categories. Prices have surged as demand from AI data centers outpaces the small amount of new supply coming online. Sandisk recently announced a third fabrication plant, and Micron has several facilities under construction, but most of Micron's capacity will not be operational until mid-2027 and Sandisk's not until later. The analysis notes that the prolonged shortage benefits both stocks in the near term.

Micron's dual-market advantage

Micron produces both DRAM, used for rapid compute access, and NAND, used for long-term storage in solid-state drives. Sandisk produces only NAND. The analysis contends that Micron's presence in both markets provides a hedge: if NAND supply constraints ease first, DRAM pricing can still support results, whereas Sandisk is fully exposed to a single product cycle. It also points out that Micron began building new capacity earlier than Sandisk.

Earnings momentum and valuation

Micron reports its quarterly results on September 30. Wall Street consensus expects revenue growth of 349 percent, though the company has a recent history of exceeding forecasts, in its last reported quarter it guided for $33.5 billion and delivered $41.5 billion. Both companies are growing revenue at an annualized rate of 350 percent or more. On fiscal 2027 earnings estimates, Micron trades at about six times and Sandisk at nearly seven times, a difference the analysis characterizes as negligible given the uncertainty around the memory cycle.

The cycle risk

The low multiples reflect skepticism that current pricing can persist once the new fabrication capacity comes online in 2027 and 2028. If prices remain elevated, both stocks are attractive at current levels; if they collapse as supply catches up, the investment case deteriorates for both. The analysis concludes that neither valuation nor growth offers a decisive edge, leaving Micron's product diversification and earlier capacity timing as the primary differentiators.