5 Red Days In A Row: Onto Innovation Stock Is Down 19%
A five-day slide has erased significant value from this semiconductor equipment stock, raising questions about its premium valuation against its fundamentals.
Onto Innovation (ONTO) stock has moved lower for 5 consecutive trading days, a cumulative loss of 19%. The streak has erased about $2.8 billion from the company’s market value, which now stands at about $12 billion.
Onto Innovation Inc. engages in the design, development, manufacture, and support of process control tools, lithography systems, and process control analytical software for semiconductor and advanced packaging device manufacturers.
The Streak Next To The S&P 500
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- 5 Red Days In A Row: C.H. Robinson Worldwide Stock Is Down 19%
- Lamb Weston Stock: 6 Straight Green Days, Up 17%
- 6 Green Days In A Row: Steel Dynamics Stock Is Up 13%
- FormFactor Stock Slides 22% Over 5 Straight Down Days
Here is how ONTO stock stacks up against the S&P 500 over the streak and the periods around it:
| Return Period | ONTO | S&P 500 |
|---|---|---|
| 1D | -7.8% | 0.2% |
| 5D (Current Streak) | -19.1% | -1.1% |
| 1M (21D) | -25.3% | 1.0% |
| 3M (63D) | -18.9% | 3.6% |
| YTD 2026 | 53.2% | 8.5% |
| 2025 | -5.3% | 16.4% |
| 2024 | 9.0% | 23.3% |
| 2023 | 124.6% | 24.2% |
Is the price disconnecting from the business?
The data presents a mixed picture. The stock’s recent decline is largely its own story, as the S&P 500 returned -1.1% over the same period. Fundamentally, Onto’s revenue over the last twelve months grew 0.5%, compared to an S&P 500 median of 7.8%. Its operating margin is 12.2%, below the S&P 500 median of 18.4%.
Yet the market has awarded the company a high price-to-earnings multiple of 113.1, far above the S&P 500 median of 24.4. For context, losing streaks are not the dominant market trend right now: 62 S&P 500 stocks are on losing streaks of 3 days or more, while 248 are on winning streaks.
A streak is information, not an instruction.
A string of losses like this is a signal about momentum and investor attention. It is not, by itself, a reason to act. The disciplined response is to use this moment to check the business against the price the market is asking for it.
The numbers show a company with a premium valuation whose recent growth and margin figures trail the broader market medians. This streak simply brings that tension into focus, offering a clear starting point for your own research.
If the drop has you weighing an entry, resist buying a falling price alone. Our Buy the Dip screen ranks the marked-down names where growth and cash generation still support a recovery.
Those watching the group rather than this one name have another route: our ETF Scorecard shows how the technology funds stack up. That way no single company’s next surprise decides the outcome.
ONTO Has Fallen 63% From A Peak
A stock that falls day after day is a live lesson in what single name exposure feels like. ONTO itself has fallen 63% from a peak within the past five years, and a fall like that lands very differently when one position carries too much of your wealth. Knowing what a repeat would do to your net worth is exactly what the Trefis Wealth team computes, with the same rules-based systematic discipline that runs our High Quality Portfolio. Request a free vulnerability audit of your biggest positions.