ICHR vs PDFS: Correlation
How closely do Ichor Holdings (ICHR) and PDF Solutions, Inc. (PDFS) trade together? Their weekly returns over three years give a correlation of 0.68, which is strong.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ICHR and PDFS?
On 3 years of weekly data the ICHR/PDFS correlation comes out at 0.68, strong. The relationship has been stable: the 1-year correlation (0.65) sits close to the 3-year figure. The 5-year figure is 0.63, and annualized covariance runs at 2422.8 %².
Among the 12 assets we track against ICHR, PDFS ranks #4 by 3-year correlation. The last year tells two different stories: ICHR led by 106.2 percentage points, +239.8% for ICHR against +133.6% for PDFS. Risk is not evenly split, since ICHR carries 1.6 times the volatility of the other side.
How is this computed?
Pearson correlation on weekly returns: ρ(A,B) = cov(rA, rB) / (σA · σB), over windows of 52, 156 and 260 weeks. Covariance is annualized (×52) and expressed in %². Full definitions on the methodology page.
ICHR vs PDFS: side by side
| ICHR (Ichor Holdings) | PDFS (PDF Solutions, Inc.) | |
|---|---|---|
| 1-year return | +239.8% | +133.6% |
| 5-year return | +32.8% | +105.9% |
| Volatility (ann.) | 75.0% | 47.4% |
| Beta vs S&P 500 | 2.32 | 1.55 |
| Max drawdown (3Y) | -69.1% | -58.5% |
| Market cap | $2.2B | $1.9B |
| P/E (trailing) | – | 177.5 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ICHR | PDFS |
|---|---|---|
| 2022 | -41.7% | -10.3% |
| 2023 | +25.4% | +12.7% |
| 2024 | -4.2% | -15.7% |
| 2025 | -42.8% | +5.4% |
| 2026 | +220.6% | +61.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ICHR and PDFS good diversifiers for each other?
Somewhat, no more. With 0.68 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between ICHR and PDFS?
As of 2026-08-27, the correlation of weekly returns between ICHR and PDFS is 0.68 over 3 years, 0.65 over 1 year and 0.63 over 5 years.
Is PDFS a good diversifier for ICHR?
Somewhat, no more. With 0.68 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.68 mean?
A reading of 0.68 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/ichr-vs-pdfs.json
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Related comparisons
Hubs: ICHR correlations · PDFS correlations
