SanDisk's Record Quarter Exposes the Brutal Math of AI-Era Expectations

SanDisk's record Q4 revenue and earnings fail to lift stock as guidance misses high bar, fueling fears of a NAND peak.

There is a peculiar arithmetic at work in the AI infrastructure trade right now: a company can grow revenue by 372 percent, beat earnings estimates by nearly $5 a share, and still watch its stock get sold off as if the business were shrinking.

SanDisk shareholders experienced exactly that paradox this week. The memory specialist closed Friday at €1,050.00, down 4.55 percent on the session, extending a monthly decline that now stands at roughly 31 percent. The stock sits 49 percent below its June 22 all-time high of €2,060.00 — a stunning reversal for a company that just delivered what may be the best quarter in its history.

The Guidance Gap That Changed Everything

For the fourth fiscal quarter of 2026, SanDisk reported revenue of $8.97 billion, up 51 percent sequentially and 372 percent year over year. Non-GAAP earnings per share came in at $39.25, blowing past the $34.51 consensus. Gross margin hit a record 84.6 percent. By any historical standard, these are numbers that should trigger a rally.

The problem is that in this market, history no longer matters. What matters is what comes next.

Management guided first-quarter fiscal 2027 revenue to a range of $10.3 billion to $10.8 billion. The midpoint of $10.55 billion lands just shy of the $10.8 billion that several sell-side models had baked in. In a sector where "excellent" has become the minimum acceptable outcome, that small gap was enough to trigger a wave of selling. The upper end of the range matches consensus; the midpoint does not. Wall Street, it seems, is no longer grading on a curve.

The Data Center Engine Keeps Accelerating

Beneath the quarterly noise, a structural transformation is underway. SanDisk is attempting to shed its identity as a cyclical NAND supplier and recast itself as a predictable infrastructure provider — and the numbers suggest the strategy is gaining traction.

Data center revenue for the full fiscal year 2026 grew 437 percent to $5.15 billion, with the segment roughly doubling quarter over quarter to about $3 billion. The company has disclosed eight long-term "NBM" supply agreements with a minimum value of $93.9 billion, of which $16.5 billion carries guaranteed payments. These contracts run through 2027 and 2028, providing a degree of revenue visibility that memory companies rarely enjoy.

CEO David Goeckeler pointed to "over four years of visibility" into NAND supply constraints, signaling that management views the current shortage as structural rather than transitory. The company is also pushing into new territory: at the Flash Memory Summit 2026, SanDisk and SK Hynix unveiled "High Bandwidth Flash" (HBF), a new memory tier designed to sit between high-bandwidth memory and conventional SSDs, targeting the KV-cache demands of agentic AI systems.

A Market Pricing in the Peak

The bear case rests on a familiar fear: that the NAND cycle is about to turn. Some industry analysts warn of a potential price peak for memory chips as early as the second quarter of 2027. The expansion of Chinese competitors like CXMT looms as a longer-term threat to margins. The market appears to be discounting the stock for a cyclical downturn that has not yet materialized in the actual business.

The technical picture reflects that anxiety. The 14-day RSI sits at 41.5, approaching oversold territory, while the stock trades 28.17 percent below its 50-day moving average. The annualized 30-day volatility of 154.05 percent underscores just how violently the market is searching for a fair price. At €1,050.00, the shares hold a 20.69 percent cushion above the 52-week low of €870.00 — but that buffer has been shrinking steadily.

Management Bets on Its Own Stock

Against this backdrop, the board has authorized a $14 billion buyback program, supported by $15.5 billion in available capital. It is a decisive statement: management believes the selloff has overshot the fundamentals. Companies do not repurchase shares at this scale if they expect the business to be permanently impaired.

The analyst community appears to agree, at least on valuation. The average price target stands at approximately €1,918.66, implying upside of 82.7 percent from Friday's close. That optimism collides with a monthly decline of nearly 31 percent, leaving investors to weigh whether the market is underestimating the longevity of the NAND shortage — or whether SanDisk's own guidance is too rosy.

The gap between the stock price and the underlying business has rarely been this wide. Record margins, a $93.9 billion backlog, and a management team buying back stock in size all suggest the company is healthier than the chart implies. But in an AI trade that demands perfection every single quarter, even a blowout can feel like a disappointment. The path back to fair value may be bumpy — but the fundamentals argue the destination is still there.