Memory stocks surge 15% as SanDisk's 2030 margin target lifts sector

Stock	Today	YTD
SanDisk (SNDK)	+15%	+466.3%
Western Digital (WDC)	+10%	+163.8%
Micron (MU)	+6%	+219.5%

Memory stocks surged Thursday as SanDisk jumped 15% to $1,550 after targeting 80% gross margins through fiscal 2030.

"We are optimizing for growth, sustainability and returns," Luis Visoso, chief financial officer at SanDisk, said. "As we do that, we expect to return 100 percent of excess cash to our shareholders after investing in the business."

The rally swept the storage stack. SK Hynix climbed 9% to $168, Western Digital rose 7% to $487, Micron gained 6% to $964, and Seagate advanced 5% to $922. The Roundhill Memory ETF added 5% to $57.

SanDisk's framework rests on AI-driven demand for data-center flash, which management projects will reach 1.2 zettabytes by 2030. The next test comes with Micron's fiscal fourth-quarter report.

SanDisk's 80% Margin Target Resets the Group

The move began in Seoul. Korea's Kospi jumped 4% overnight on AI infrastructure optimism, with SK Hynix up 6% and Samsung Electronics up 5% in Seoul. The Kospi now sits 23% above its July 30 low.

SanDisk's investor day, "SanDisk in Focus," laid out targets for fiscal 2028 through fiscal 2030: mid-to-high teens revenue growth, non-GAAP gross margins near 80%, operating margins near 75%, and adjusted free cash flow margins near 50%. The company also plans to return 100 percent of excess cash to shareholders.

Management anchored the durability claim on New Business Model agreements with eight customers, representing about 50 percent of bits in fiscal 2027 and two-thirds in fiscal 2028. The agreements carry committed volumes, enforceable contractual frameworks with minimum financial guarantees, and structured pricing.

SanDisk also advanced its NAND roadmap, including BiCS9 QLC and BiCS10 QLC products. The company says BiCS10 QLC delivers a 60 percent increase in bit density versus BiCS8.

The read-across is broad. Western Digital is the natural comparable after separating from SanDisk in 2025. Micron spans DRAM and NAND and is the primary U.S.-listed way to play a broad memory cycle. SK Hynix is a critical HBM supplier for AI accelerators, though it trades as an ADS whose primary listing is the Korea Exchange.

The day's two strongest names are also linked commercially. On Aug. 3, SanDisk and SK Hynix announced a collaboration on High Bandwidth Flash, a technology aimed at AI inference workloads that require far more memory capacity than current architectures deliver.

A Bounce Inside a Month-Long Drawdown

Even with the bounce, the group is climbing out of a rough stretch. SanDisk entered the session down about 20 percent over the prior month, and Western Digital had fallen 18 percent. Micron sits up 237 percent year to date.

An 80 percent gross margin sustained through fiscal 2030 is an extraordinary claim in NAND, an industry defined by brutal cyclicality. The target is a forecast, not an achieved result, and SanDisk already trades up 466 percent year to date. Wall Street expects normalized earnings of $213.23, $265.12, and $214.10 from SanDisk across the next three years.

Investors can watch whether the Korea-led bid carries into Friday's Seoul session, whether Seagate and the hard-drive side keep pace with the flash names, and whether the group can close the month-long gap it is still climbing out of. A cohort that just fell 20 percent in a month can move violently in both directions, so position sizing should reflect that volatility.

This article is for informational purposes only and does not constitute investment advice.