SanDisk|Record Revenue, 36% Crash

The Crash Nobody's Fundamentals Explain

SanDisk stock has fallen 36% in five trading sessions, sliding from $1,589 to $1,019 a share. Micron Technology is down alongside it, off 6% to $775 in the same session. Neither company reported a company-specific shock. The selloff hit the entire memory sector at once, with SanDisk's steepest single day a 12% drop on July 28th and an 11% closing decline the session after.

That price action sits against SanDisk's actual quarterly numbers. Fiscal Q3 revenue reached $5.95 billion, up 251% year over year, with its Datacenter segment climbing 645% to $1.47 billion. SanDisk shares had gained 576.9% year to date before this slide began. On fundamentals alone, none of that looks like a sell signal.

One highly upvoted retail trading thread framed the disconnect bluntly: will SanDisk and Micron come back green after SK Hynix's results, probably not, despite great earnings. That is the question this video answers. The crash is not about SanDisk's business. It is about what SanDisk's business now has to prove.

Where the Fear Actually Started

The selling began on July 27th, not with a memory-sector earnings miss, but with a Shanghai stock debut. China's ChangXin Memory Technologies, CXMT, surged more than 500% on its Shanghai STAR Market listing, closing its first day valued near 540 billion dollars and raising up to 9.8 billion dollars in the offering. SanDisk fell 12% that same session, Micron dropped 5%, and SK Hynix's own shares tumbled in sympathy.

CXMT is already the world's fourth-largest DRAM maker at roughly 8% market share, behind Samsung, SK Hynix, and Micron. Reports that Apple is testing CXMT's DRAM chips gave the competition story teeth beyond a one-day valuation pop. Investors read the IPO as evidence that Chinese supply could reach top-tier customers sooner than the market had priced in, threatening the pricing power that has driven memory margins all year.

The second and larger jolt landed two days later. SK Hynix reported a record operating profit, up 557% year over year, with a 76% operating margin, its fifth consecutive record quarter. But the company also guided 2026 capital spending up 50% to at least 31 billion dollars, and the print still missed the market's elevated expectations. Barclays cut its SK Hynix price target to 300 dollars from 330 while keeping an Overweight rating.

That combination flips the narrative. Record profit with guidance for sharply higher spending reads to the market as evidence the AI memory boom is entering a heavier-investment, thinner-margin phase, not proof the boom is intact. The selloff is no longer about whether memory demand exists. It is about whether the capital being poured into new capacity outruns the profits that capacity is supposed to generate.

A Sector Split That Tells the Real Story

The clearest evidence for what's actually being priced sits inside the sector itself. On the same day SanDisk fell 7% to $1,019, Seagate Technology rose 2% to $759 after beating its own earnings, and Western Digital was flat at $465. Both are hard-disk-drive-focused storage names. SanDisk and Micron, the NAND and DRAM names most tied to the AI capex story, are the ones getting sold.

The Roundhill Memory ETF, whose top three holdings are Samsung, SK Hynix, and Micron at a combined 73% weight, has fallen 20% over five sessions, underlining how concentrated and reflexive this move is. The Philadelphia Semiconductor Index is down 19% for the month, on pace for its worst since 2008, with every member below its 50-day moving average. UBS strategist Mark Haefele attributed the broader chip weakness to fragile sentiment heading into hyperscaler earnings, layered on top of the CXMT overhang.

That split is the interpretation that matters. This is not a verdict on AI infrastructure demand broadly. It is a targeted repricing of the memory-specific capex cycle, isolated from the storage complex that shares some of the same customers. The market is separating a durable data-center storage story from a memory-pricing story it now considers overextended and newly contested by Chinese supply.

What Would Actually Resolve This

The bull case has not disappeared from the record. Deutsche Bank projects 2026 DRAM demand outstripping capacity by roughly 10%, a gap the bank sees widening to 29% by 2028 before narrowing later in the decade. SanDisk's own guidance still points to a supply-demand imbalance persisting for years, and Micron's HBM4 is already shipping in volume to its lead AI accelerator customer.

Two concrete checkpoints will help settle the question sooner rather than later. Morningstar's William Kerwin holds a $1,000 price target on SanDisk with a very-high uncertainty rating; whether shares hold that level is the first signal. Microsoft and Meta reported after Wednesday's close, and Apple and Amazon follow Thursday, with hyperscaler AI-capex commentary from all four capable of moving memory sentiment sharply in either direction.

What the evidence supports is this: SanDisk's underlying business has not weakened, but the multiple the market was willing to pay for the AI-memory story has compressed on capex-overheating fear, freshly sharpened by Chinese competition. Until hyperscaler capex guidance and SK Hynix's own follow-through clarify whether that capex is sustainable or excessive, SanDisk trades on sentiment around that unresolved question, not on the fundamentals it just reported.