FORM plunges 12% in a single day: Is it a blow to fundamentals or emotion?

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FORM plunges 12% in a single day: Is it a blow to fundamentals or emotion?

Friday, June 26, 2026

Today, FormFactor (FORM) hit a large bearish candlestick, plunging 12.11% in a single day to close at $130.74, with trading volume expanding to six times the daily average over the past three months—yet just seven weeks ago, it delivered its "strongest quarterly report ever," with revenue soaring 32% year-on-year and profits exceeding expectations, rising over 160% at one point this year. Why would a company with no fundamentals be flawed and lose more than one-tenth of its market value in a single day? Did someone see through something in advance, or was it an emotionally driven stampede?

Latest price $130.74 ▼ -12.11%

Total market capitalization $10.19 billion — The price-to-earnings ratio is 152 times

Volume-to-volume ratio 6.0 times ▲ Far exceeding the daily average

It doesn't make chips, but gives every AI chip a 'check-up'

Founded in 1993 and headquartered in Livermore, California, FormFactor does a job that may sound niche but is actually stuck at the throat: semiconductor testing and measurement. Its core product is called the Probe Card, which can be understood as the "inspection probe" before the chip leaves the factory—each wafer must be contacted point by point, powered on, and read to determine yield or qualification.

The business is divided into two parts

The Probe Cards division, which holds the majority, covers everything from GPU, CPU, and other system-on-chips to DRAM, HBM storage, RF, image sensors, and even quantum computing processors; Another Systems division provides probe stations, thermal subsystems, and cryogenic testing instruments. Its three major customers are SK Hynix, Intel, and NVIDIA—the three most willing to spend money in the AI computing power and high-bandwidth storage industry chain.

So what exactly makes its moat so strong? The answer lies in a counterintuitive fact: HBM stack layers have increased from 4 to 8, dies per chip have increased from 2 to 16, and test complexity has not increased linearly, but has doubled. The more advanced the chip, the more it relies on this "health check" process.

A price-to-earnings ratio of 152 times—are you buying now or the next five years?

Let's start with a set of striking contrasts

FORM has a market cap of $10.19 billion, yet its price-to-earnings ratio is 152 times, while industry leader KLA typically only has 20 to 30 times. In other words, the market is willing to pay five to seven times the price of its peers for every yuan of profit this company. Where does this premium come from?

The report judges it as "extremely stretched." Even with a more aggressive approach, the company's annual net profit is just over $50 million, with a price-to-sales ratio (P/S) of about 12.8 times, an Enterprise Value Multiple (EV/EBITDA) close to triple digits, and a free cash flow yield (FCF yield) of just 1.12%—meaning that at current price, relying solely on cash flow to break even would take nearly ninety years.

But the other side of the coin is

The cash flow itself is healthy. FY2025 free cash flow was $115.4 million, with Q1 quarterly revenue of $45 million, a year-on-year increase of over 90%, with the cash flow-to-net profit ratio remaining stable at more than double. The company can support R&D and production expansion entirely on its own self-financing, without needing external funding.

So the question isn't whether the company is good or not, but rather: at current prices, has the next five years of good already been fully priced in at once?

During the breakout period, emotional headwinds hit, and the moving averages showed the first crack

The report defines FORM as a "breakout period," with a clear logic: revenue growth jumped from 2.8% in FY2025 to 32% in Q1; Operating profit surged 403% year-on-year, and net profit grew 219%—a typical example of profit release after scale effects have crossed a critical point.

Looking at the moving averages, the market had previously accepted this story: the 200-day moving average was still at $84, and the 50-day moving average had risen to $135, indicating a steep upward long-term trend. But today's closing price was $130.74, marking the first clear break below the 50-day moving average — the first visible crack in the trend to watch out for.

The biggest fear during breakout periods is not fundamental falsification, but excessive expectation and overdrawn valuations. When emotions receded, the fastest runner often fell the hardest.

The king of probe cards, but not the king of the closed beta game

FormFactor's strongest territory is DRAM and HBM probe cards—in this fastest-growing sector, it is almost the top certified supplier that top customers cannot avoid. Semiconductor factories switching to a probe card supplier require certification cycles of 12 to 24 months, and also bear the risk of yield fluctuations. This high switching cost is their thickest moat.

But broadening the horizon, competition is not easy. KLA's market share and pricing power in front-end wafer inspection far surpass it; VIAVI is head-to-head in high-frequency optoelectronic interconnect testing, with its network testing division revenue growing over 54% year-on-year; The real concern comes from the next generation—with the rise of panel-level packaging (PLP) and glass substrates, new players like ONTO and MKSI are making moves on new routes, which are precisely the weak points for FORM.

More subtly, the wafer testing equipment gap exposed by NVIDIA on the Vera Rubin platform is both an opportunity and a wake-up call: if FORM cannot timely release products adapted to the new architecture, today's "irreplaceable" situation may not last three years. It is the king of probe cards, but in the closed beta game, it has not yet mastered everything.

The ceiling is very high, but the penetration rate is already quite high

Let's break down the numbers

The global semiconductor test equipment market is expected to reach approximately $80 to $100 billion by 2025, with probe cards accounting for about 30%, or $24 to $35 billion. Driven by AI accelerators, HBM, and advanced packaging, the probe card market is expected to grow at a compound annual growth rate of 15% to 20% over the next three years, with TAM expected to reach $37 to 60 billion by 2028.

FORM truly serves about 60-70% of the market, and its share in DRAM probe cards is estimated to reach 40% to 55%. This means the ceiling is indeed high, but in its strongest segment, its penetration rate is already quite high. Any further incremental growth depends more on exponential expansion of HBM usage, rather than simple market share expansion—which is why any movement in HBM makes it so sensitive.

Why do bulls still dare to get on board?

Putting aside today's sharp drop, those who favor it hold several solid cards:

▲ Bull Case

What the bears worry about is precisely the scenario unfolding today

And the bearish logic today is best illustrated today with a large bearish candlestick:

▼ Bear Case

The tide has turned; the next step is to see who will prove the truth

In the short term, FORM's stock price has been almost entirely driven by the sentiment of HBM's main theme—whoever cashes first gets the say:

•	The direct trigger for today's sharp drop: SK Hynix postponed its next-generation HBM4 expansion from Q2 to Q3, compounded by market concerns that NVIDIA might cut Rubin platform output, causing the entire AI chip chain to plunge collectively—this is an industry sentiment event, not a problem with FORM itself
•	Next quarterly report (Q2 2026, expected from late July to early August): Management has projected revenue of about $240 million, setting a new DRAM probe card record. Whether it can be delivered is key to verifying the "breakthrough period."
•	Second half of 2026: Whether the new generation high-frequency/photonic co-packaging test equipment adapted to Vera Rubin can be commercialized will determine its position in the CPO era
•	This round of "all the good news is fully out" is strong—the optimistic expectations for the HBM supercycle have long been priced in, and now, when the same main line reverses, the most elastic stocks also fall the hardest

A year of expectation leading and fundamentals lagging

Over the past year, FORM has followed a typical path of "expectation first, fundamentals lagging." FY2025 was actually an adjustment period: annual revenue grew only 2.8%, net profit actually dropped by more than 20%, and Q1 2025 was the darkest moment, with quarterly net profit of just $6.4 million.

But just as the fundamentals were at their worst, the stock price quietly started to move—rising over 160% at one point this year, surging from around $26 to a high of $159 in 52 weeks. The market is betting that AI and HBM demand will eventually be realized, and the Q1 2026 explosion has indeed confirmed this bet.

But the cumulative 270% increase far outpaced the fundamental improvement of 32% in revenue and 200% in profit—indicating that prices are not just about achieved growth, but also about pre-pricing for sustained high growth in 2027 and 2028. Today's plunge, in a sense, is just a belated relief from this excessive optimism.

⚠️ Risk Notice • Valuations are too high, with a price-to-earnings ratio above 150 times zero tolerance for performance flaws • With concentrated customers, any one of the three major clients cutting capital expenditures severely damages revenue • The HBM cycle is a double-edged sword; when sentiment fades, the decline is amplified • Profits are nonlinear; net profit in FY2025 once fell by 21.8% year-on-year • New packaging technology routes may erode existing moats within two to three years

🟡 Neutral Solid performance but overdrawn valuations, emotional decline is evident, and the cost-performance ratio is still unattractive.

💬 Discussion At $131 FORM, will you bottom-fish, or wait a little longer?

Data source

•	Latest market and P/E ratios: [Yahoo Finance - FORM] (https://finance.yahoo.com/quote/FORM/), [StockAnalysis - FORM Market Cap] (https://stockanalysis.com/stocks/form/market-cap/)
•	Reasons for today's sharp drop (SK Hynix delays HBM4 expansion, sector crush): Investing.com - Why is FormFactor stock down、TechPowerUp - SK Hynix Slows HBM4 Ramp
•	Q1 2026 Earnings Report and Q2 Guidance: Investing.com - FormFactor Q1 2026 beats、StockTitan - FORM 8-K Record Q1
•	Analyst ratings and target prices: [Timothy Sykes - FORM analysts hike targets] (https://www.timothysykes.com/news/formfactorinc-form-news-20260613/), [WallStreetZen - FORM]. forecast](https://www.wallstreetzen.com/stocks/us/nasdaq/form/stock-forecast)
•	Research report papers (business, valuation, competitors, moats, market size, bullish/bearish model): in-depth FORM internal FORM research report generated on 2026-06-26