Sandisk Stock Was the Biggest Winner in the First Half of 2026. What's Next for the Second Half?

Sandisk (SNDK) is up ~800% year-to-date in 2026, driven by a worsening NAND memory shortage that the industry expects to persist beyond 2027. The article cites fiscal Q4 growth of 336% (ended June) and 122% growth for fiscal 2027, and argues valuation at ~11x fiscal 2027 earnings still leaves room for further upside. With data-center spending projected at $3T–$4T annually by 2030, the piece frames SNDK as likely to benefit for years despite the stock’s surge.

Analysis

SNDK is the cleanest expression of a memory shortage, but the larger implication is margin transfer from storage buyers to the few suppliers with usable capacity. That helps SNDK most, gives MU some halo, and likely pressures server OEMs, storage integrators, and cloud customers that are already managing high AI capex intensity; the first-order winner can become a second-order margin tax on the rest of the data-center stack.

The near-term trade is less about the current print than about how long customers can delay purchases. If NAND tightness persists into the next 1-3 quarters, contract pricing should keep drifting up and consensus FY27 earnings can still move higher; that supports continued multiple expansion even after the run. But the supply response is slow, so the more material reversal risk is not today’s headline, it is a 2027-2028 overbuild cycle once equipment lead times and yield improvements finally catch up.

Contrarian view: the market may be right on scarcity but underestimating cyclicality. Memory stocks often look cheapest at the top of the cycle because earnings are accelerating faster than price, so the key falsifier is not valuation but evidence that spot pricing, backlog, or inventory days are peaking. If NAND pricing flattens for 2 consecutive months or SNDK guides to margin normalization, this becomes a fast de-rating story rather than a long-duration compounder.

Key Decisions for Investors

• Buy SNDK only on a 10-15% pullback, preferably via 6-9 month call spreads to avoid chasing a parabolic move; thesis works if NAND pricing and FY27 EPS revisions keep rising, and breaks if guidance implies margin peak.
• Relative value: long SNDK / short WDC as a storage-scarcity pair trade; SNDK has the most direct operating leverage to NAND tightness, while WDC is a cleaner hedge against any normalization in storage demand.
• Prefer SNDK over MU for pure NAND exposure; MU still participates in the memory upcycle, but the cleaner earnings beta is in NAND-only exposure if the shortage lasts through 2027.
• Set a hard watch item on NAND contract pricing and inventory days at SNDK/MU next earnings season; if either stops tightening, trim exposure quickly because the stock is already discounting a very strong cycle.