NEXT PICK · Market Insights
SNDK has risen 40 times in one year—is it a cycle or a bubble?
Thursday, June 25, 2026
Flash memory giants surged 22% in a single day, but the catalyst came from neighboring Micron
A stock named SNDK trended today, surging 21.97% in a single day to close at $2,335, with a market cap jumping to $345.7 billion—but if you look through its own bulletin board, you'll find it posted nothing today.
The real spark was its archrival, Micron: its quarterly revenue quadrupled year-on-year and operating profit margin exceeded 80%, boosting sentiment across the entire storage sector, and SNDK was simply boosted to the sky.
So here's the question—a stock that has risen nearly 40-fold in the past 12 months and led the S&P 500 by 857% so far this year, relying on someone else's earnings to rise another 22%, is this the beginning of a supercycle or the end of a passing of the flames?
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Latest price
$2,335
▲ +21.97%
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Year-to-date gains
857%
▲ S&P is number one
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Analyst target price
$1,773
▼ -24%
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A pure NAND player spun out from Western Digital
Sandisk is headquartered in Milpitas, California, and is a storage company specializing in NAND flash memory. It only re-registered as an independent entity in 2024—before that, it was the flash business unit of Western Digital, so strictly speaking, it is a technically advanced company with a relatively young IPO history.
Its product line is very broad
From solid-state drives (SSDs) for desktops, laptops, and gaming consoles, to embedded storage in smartphones and tablets, to storage solutions for automotive, industrial IoT, and smart home scenarios, as well as the familiar memory cards and USB drives. Our customers range from computer manufacturers and OEMs all the way to data centers and cloud service providers.
Where does its irreplaceability come from? Globally, only a handful of players can mass-produce NAND on a large scale—Samsung, SK hynix, Kioxia, Micron, plus Sandisk. Wafer process, 3D stacking layers, controller firmware, yield management—each step is a high threshold; Customer certification cycles often take 12 to 18 months, and once approved, they are not easily replaced.
But the moat also has gaps
NAND is ultimately a highly standardized product, with major clients generally adopting dual-source and multi-source procurement. In other words, Sandisk is hard to replace as a whole, yet it could be cut off from a customer at any time—this is not on the same level as NVIDIA's CUDA ecosystem barrier that locks users down.
79x or 25x? It depends on which quarter you believe in
Let's start with a static snapshot
The current P/E ratio is about 79x, and the price-to-sales ratio is about 26x—putting it within the typical P/E range of 20 to 40x in the semiconductor storage sector, the premium is blatantly visible. Earnings per share over the past twelve months were $29.71, corresponding to a market value of $345.7 billion—no matter how you calculate it, it's not cheap.
But the bulls immediately refuted
Within this 79-fold denominator, there are still those few huge losses from a year ago. If we use the most recent quarter's earnings per share of $23.03 for a simple annualized (multiplied by 4, about $92), the forward P/E ratio corresponding to the current stock price would plummet to around 25 times. The same company's valuation story can differ by three times—which one do you believe?
What's worse is that the cash flow puzzle is still missing a piece. In the company's independent financial sequence, several quarters of free cash flow are simply marked as "no data." The most recent quarter with $3.6 billion in net profit has yet to disclose the corresponding free cash flow. The free cash flow yield is almost zero.
Can the surge in net profit be converted into real cash? In the storage industry, where fab capital spending eats up cash, this is precisely the most questioned but currently unverifiable link.
Both finances and stock prices are calling it a "boom period," and moving averages have become distorted
From a fundamental perspective, this is a textbook explosive trajectory: revenue surged from $1.7 billion in a loss-making season to $5.95 billion in the most recent quarter, a sharp 97% quarter-on-quarter increase, with data center business soaring 233% year-on-year; The operating profit margin rose from about -110% to positive 69%, and the return on equity surged to 38.71%.
But the technical aspect has already reached an extreme. The 50-day moving average is around $1,470, the 200-day moving average is about $643, and the stock stands at $2,335—more than 260% above the 200-day moving average. Such deviations are extremely rare among individual stocks; it shows the market fully accepts the "boom period" narrative, but it also means that any disturbance causes a terrifying pull back to the mean.
The high elasticity of pure NAND is also a bare run without hedging
Sandisk's opponents are all giants. The most direct reference is Micron—the only pure memory chip giant in the US, competing on both DRAM and NAND fronts. This time, it was its earnings report that ignited the entire sector. Micron's public price-to-earnings ratio is about 20 to 30 times, far below Sandisk's 79 times. The market either assumes Sandisk's growth is faster or is paying for the bubble.
Its former employer Western Digital overlapped heavily with its products, but WD still carries the traditional mechanical hard drive business behind its backs; Meanwhile, AI data storage is rapidly replacing HDDs with SSDs, which ironically benefits Sandisk, which is positioned purely as NAND. Seagate is also trapped under pressure to replace mechanical hard drives.
The real ceiling comes from Samsung and Kioxia. Samsung leads the industry in R&D, production capacity, and 3D stacking layers, and its business is diversified—when memory declines, it can hedge profits from phones, panels, and foundries. What about Sandisk? Pure storage and pure NAND are most elastic during upward cycles and have nowhere to hide during downward cycles. Is this purity a sharp blade or a weakness?
The ceiling is high, but the ceiling can collapse
The global NAND flash market has been roughly in the $60 to $80 billion range over the past year or two, driven by massive demand for enterprise-grade SSDs driven by generative AI, capacity upgrades for smartphones and PCs, and automotive intelligence. The report cites views that L2+ autonomous driving requires five times the storage per vehicle compared to regular cars, and humanoid robots are ten times higher than L2+ vehicles—if these incremental increases are realized, the market size could reach $100 billion to $150 billion by 2028.
But a high ceiling doesn't mean a stable floor. NAND is a highly cyclical industry, with new capacity typically released 12 to 18 months after announcement, while Samsung, SK hynix, and Kioxia are all expanding production at this moment. The ceiling on demand is rising, and the flood of supply is on its way—this is the most easily overlooked half of the market size story.
Growth speed, profitability, and catalysts—three pillars stand up simultaneously
The bulls' logic is built on several hard numbers confirmed by earnings reports, each one astonishing:
| ▲ Bull Case |
| ① | Revenue grew 217% year-over-year, with a 97% quarter-on-quarter increase in the most recent quarter, and data center business surged 233% year-over-year—this isn't linear growth, but exponential growth |
| ② | Operating profit margin rose from about -110% to +69%, an improvement of nearly 180 percentage points, driven by volume, price, and economies of scale |
| ③ | Return on equity was 38.71%, quarterly net profit was $3.6 billion, and earnings per share were $23.03, far exceeding analysts' expectations of $14.36 |
| ④ | Using the most recent quarter's annualized earnings per share, the forward P/E ratio is about 25 times, which is not expensive for a stock with triple-digit growth |
| ⑤ | The company has set revenue guidance for the next quarter as high as $7.75 billion to $8.25 billion, with earnings per share of $30 to $33, with growth visibility extending into the next quarter |
| ⑥ | AI inference requires high-speed storage to load context, and the structural trend of SSDs replacing HDDs is right on Sandisk's main course |
The flip side of perfect pricing is that any flaw can be fatal
Bears do not deny growth; they question how much optimistic expectations are actually being stuffed into the price:
| ▼ Bear Case |
| ① | The price-to-earnings ratio is about 79 times, and the price-to-sales ratio is about 26 times, with absolute levels at extremely high levels, leaving almost no room for disappointment |
| ② | A year ago, the company was still suffering huge losses: a net loss of $1.64 billion in the previous fiscal year, followed by another $1.93 billion in the following quarter—the impact of a downward cycle has just begun |
| ③ | A 69% operating profit margin is historically rare and may include one-time dividends such as inventory appreciation and price surges, which may not be sustainable |
| ④ | Free cash flow has been missing for many periods, and no one can verify how much cash corresponds to the $3.6 billion net profit, leaving earnings quality in question |
| ⑤ | The average target price from 22 analysts is only $1,773, implying about 24% downside from the current price |
| ⑥ | Today's 22% surge was driven by Micron's earnings report and WallStreetBets' capital relay, rather than self-benefit—when sentiment fades, these kinds of stocks are often the first to give back |
The real trigger is half in someone else's hands
In the short term, SNDK's stock price will be dominated by several events, the most critical of which is not under its control:
| • | Today's key catalyst: Micron's quarterly revenue quadrupled year-over-year to $41.5 billion, earnings per share of $25.11, and operating profit margin exceeded 80%, igniting sentiment across the entire storage sector, and SNDK surged accordingly |
| • | Next earnings report on August 13: The market will test whether next quarter's revenue guidance of $7.75 billion to $8.25 billion can be delivered—this is the true catalyst for itself |
| • | Enterprise-grade SSDs replacing HDDs are accelerating, AI data storage demand continues to grow, with a positive impact expected to gradually manifest in the coming quarters |
| • | The incremental storage demand brought by automotive L2+ autonomous driving and humanoid robots is a medium- to long-term positive development, but the timing of realization remains to be seen |
From $46 to $2,335, it completes a supercycle in a year
Looking back nearly a 40-fold increase, a year ago SNDK's stock price was only about $46, and its 52-week low even reached $40.10. That starting point came at the company's darkest hour—huge losses, negative operating profit margins, and the entire storage industry at the bottom of the cycle. The market gave it the lowest price at its most desperate point.
Then the plot takes a sharp turn
First, losses narrowed, a quarterly turnaround occurred, and free cash flow turned positive at one point; Then the profit margin jumped from single digits to 35%; In the most recent quarter, revenue exploded to $5.95 billion and net profit to $3.6 billion. The stock price then surged from $46 to a high of $2,354, with an 857% increase year-to-date securing its position as the top spot in the S&P 500.
The market judged the right direction—the cycle had indeed reversed. But the nearly 40-fold increase in 12 months has already priced in the most optimistic assumption that "Sandisk has moved out of the cycle and entered structural growth." History has repeatedly shown that the reversal of NAND supply and demand always unexpectedly occurs 12 to 18 months after capacity expansion. This time, will the market bet too much again?
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⚠️ Risk Notice
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🟡 Neutral The positive news has been fully priced in, and today's rally feels more like sentiment spillover than new fundamentals from the company. |
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💬 Discussion After a 40-fold increase in one year, would you dare to chase after someone else's financial report? |
Data source
| • | Latest stock price / Market capitalization / P/E ratio / 52-week range / Analyst target price: stockanalysis.com — https://stockanalysis.com/stocks/sndk/ |
| • | Today's Unusual Movement (Micron earnings catalyst, retail investor momentum): Yahoo Finance "Why Sandisk Stock Soared Today" — https://finance.yahoo.com/quote/SNDK/ |
| • | Q3 2026 Earnings Report (Revenue $5.95B, Net Profit $3,615M, EPS $23.03, Q4 Guidance): Sandisk Investor Relations — https://investor.sandisk.com/news-releases/news-release-details/sandisk-reports-fiscal-third-quarter-2026-financial-results |
| • | Leading the S&P 500 857% This Year / AI Storage Demand Narrative: TradingKey — https://www.tradingkey.com/analysis/stocks/us-stocks/261990267-sandisk-sndk-stock-analysis-micron-ai-memory-demand-june-2026-tradingkey |
| • | Historical revenue and loss data: MacroTrends — https://www.macrotrends.net/stocks/charts/SNDK/sandisk/revenue |