Memory Splits: the Shortage Story Is Intact, the Single Names Are Not

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Memory Splits: the Shortage Story Is Intact, the Single Names Are Not

5 tickers referenced · published Aug 8, 2026

Article published Aug 8, 2026. Prices below use latest available snapshots.

MU $1,011.75 +19.2% 30d SNDK $1,786.85 +31.9% 30d WDC $536.01 +12.3% 30d STX $994.79 +26.3% 30d SIMO $272.70 +3.4% 30d

Memory and storage stopped trading as one basket this week. Micron improved, Western Digital cracked 20%, and neither move tested the structural tightness case — the week repriced the cost of expressing that case through any one company.

Ticker Price RSI Week 30 days vs 20-day From 52wk high
MU $877.57 47.6 +6.6% −7.5% −1.2% −28.8%
STX $812.76 45.8 −5.1% −5.5% −2.6% −26.8%
SIMO $256.12 46.8 +1.0% −18.3% −3.1% −30.5%
SNDK $1,212.21 41.7 −0.2% −29.8% −13.0% −42.6%
WDC $434.30 38.3 −20.3% −21.1% −15.1% −35.1%

Aug 7 close. All five still carry weak-down trend tags.

The quarters beat and the stocks fell, which makes this a guidance story, not a cycle story. SanDisk earned $39.25 a share against a $34.52 analyst consensus, Western Digital $3.56 against $3.30 — then SanDisk fell 11.8% across its print and Western Digital 17.7%. MarketWatch on Aug 5: the midpoint of SanDisk's revenue forecast came in below what analysts had been modeling. The sell side dispersed rather than capitulated — Jefferies cut its target to $1,750 from $3,000 on NAND margin fears while keeping a Buy, Bank of America argued for roughly a double from here. A high bar was missed; demand did not break. Both earnings figures are against consensus, not against a filed quarter — neither filing is out.

Nothing this week touched contract prices. The one structural datapoint came from the demand side: Semafor reported Aug 5 that major PC makers are turning to China's CXMT because they cannot source memory elsewhere, with DRAM costs tripled in eighteen months. Buyers changing where they buy is a harder shortage tell than any forecast. It is also the long-dated bear case in the same sentence — the answer to a shortage this loud is new capacity, and China is building it.

The Western Digital test is unread. The nearline case rests on three things a drive maker says on its call: allocation language, gross-margin direction, and an explicit refusal to add unit capacity. Western Digital reported Aug 5 and no account of what management said on any of the three has surfaced since. A 20% week is a verdict on a forecast, not on supply discipline. Until that call is read, the drive-maker leg is untested — not confirmed, not broken.

The read: stop buying the theme, start pricing the names. Micron is the only one of the five that gained on the week while cutting its monthly loss, and it sits 1.2% under its 20-day line where SanDisk and Western Digital sit 13% and 15% under theirs. The basket was bought for structural tightness; it now carries single-name guidance risk it was not priced for a month ago.

Desk Call

Ticker Stance Entry Invalidation Review by
MU watch reclaims and holds the 20-day ($888.26) with RSI back above 50 RSI back under 40 while price stays below the 20-day 2026-09-11
STX watch holds the 20-day ($834.21) and turns RSI back above 50 either drive maker signals added unit or greenfield capacity, or a close below the 200-day ($533.00) 2026-09-11
WDC watch not before the Aug 5 call's allocation and gross-margin language is public and read; then a reclaim of the 20-day ($511.47) any unit- or greenfield-capacity addition signalled by either drive maker 2026-09-11
SNDK pass no entry while price sits 13.0% below the 20-day ($1,393.06) and 28.2% below the 50-day a base back above the 20-day on rising volume forces a re-look 2026-09-11
SIMO watch price back above the 20-day ($264.25) with the 30-day loss narrowing RSI below 40 2026-09-11

Sources