$SNDK just showed the market that memory stocks are not finished — but after a 10%+ one-day move, the next decision is more important than the rally itself.

SanDisk closed September 4 at $1,714.55, up 10.26%, after trading between $1,582.61 and $1,736.00. Volume reached approximately 12.04M shares, versus 8.69M the previous session. That is a significant expansion in participation and puts SNDK back into a high-volatility momentum phase.

The fundamental story is equally aggressive. SanDisk reported fiscal Q4 revenue of $8.97B, up 51% sequentially, while fiscal-year revenue reached $20.25B, up 175% YoY. More importantly, data-center revenue jumped 103% sequentially in Q4 and 437% for FY2026. Management is guiding Q1 FY2027 revenue to $10.3B–$10.8B.

There is another important piece behind the move: SanDisk has been building long-term customer agreements around AI and data-center memory demand. Reuters reported that eight long-term agreements with six major customers were worth at least $93.9B, with roughly half of production expected to be tied to those agreements in FY2027.

Now look at the chart.

SNDK went from roughly $1,511 on September 1 to $1,714.55 on September 4, with Friday producing the largest move. Friday's high at $1,736 is the immediate resistance. A sustained break above that level would keep the momentum structure intact, while failure there could trigger profit-taking after such a sharp advance.

My key zones are:

Resistance: $1,736 → $1,760–$1,775
First support: $1,680–$1,690
Major support: $1,580–$1,600
Deeper structural support: $1,510–$1,530

The $1,580–$1,600 region is particularly important because it overlaps Friday's lower range and the area from which the latest expansion started. Losing that zone would make the recent breakout considerably less convincing.

Momentum is clearly strong, but this is where discipline matters. Technical readings remain broadly constructive, while another technical assessment describes the longer-term trend as positive but warns that the recent volatility makes the immediate entry less attractive without consolidation.

The bullish scenario is simple: SNDK holds above $1,680–$1,690, then breaks $1,736 with strong volume and does not immediately fall back below the breakout level. In that case, I would watch $1,760–$1,775 first, followed by the psychological $1,800 area.

The bearish scenario begins with a failed breakout. If SNDK rejects $1,736 and loses $1,680, the stock could revisit $1,600. A sustained break below $1,580 would be a much more serious warning and would shift the short-term structure from momentum continuation toward correction.

I would not chase Friday's candle.

A more controlled setup would be a confirmed breakout above $1,736, followed by a successful retest.

Entry: $1,735–$1,755 after confirmation/retest
Stop: $1,675
TP1: $1,800
TP2: $1,875
TP3: $1,950

Using approximately $1,745 as the entry and $1,675 as the invalidation gives around $70 of risk per share. The approximate upside is $55 to TP1, $130 to TP2 and $205 to TP3. That means TP1 alone is not an especially attractive risk/reward trade, while TP2 and TP3 become considerably more interesting if momentum remains strong.

For that reason, I would keep position size small and risk around 1% of trading capital, especially because SNDK's recent daily ranges are extremely large. The stop should be defined before entering, not after the trade moves against you.

The bigger picture remains constructive because AI infrastructure is supporting memory demand, and SanDisk's latest numbers show that this is already translating into revenue rather than being only a future narrative. But the stock has also experienced an enormous re-rating, so expectations and valuation are now part of the risk equation.

My verdict: bullish, but I would wait for confirmation rather than chase momentum.

Above $1,736 → $1,800 → $1,875 → $1,950 become the levels to watch.

Between $1,680 and $1,736 → consolidation zone.

Below $1,580 → bullish short-term thesis becomes significantly weaker.

The interesting part of SNDK now isn't whether the stock can move higher — Friday already proved that buyers are willing to step in aggressively. The real test is whether they can defend the breakout after the excitement cools down.

$SNDK

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