AEIS vs PLAB: Correlation
Measured on weekly returns over the past three years, Advanced Energy Industries, Inc. (AEIS) and Photronics, Inc. (PLAB) carry a correlation of 0.51, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are AEIS and PLAB?
Over the past 3 years, AEIS and PLAB moved with a correlation of 0.51, which is moderate. Lately the two have drifted apart, with the 1-year correlation at 0.40 versus 0.51 over 3 years. Over 5 years the correlation is 0.56, and the annualized covariance of weekly returns is 1349.4 %².
Within AEIS's tracked universe of 32 assets, PLAB comes in at #22 by 3-year correlation. Correlation aside, the last 12 months split them widely, with AEIS ahead by 60.8 points (+87.0% versus +26.2%).
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.
AEIS vs PLAB: side by side
| AEIS (Advanced Energy Industries, Inc.) | PLAB (Photronics, Inc.) | |
|---|---|---|
| 1-year return | +87.0% | +26.2% |
| 5-year return | +222.9% | +106.4% |
| Volatility (ann.) | 43.9% | 60.0% |
| Beta vs S&P 500 | 1.69 | 1.56 |
| Max drawdown (3Y) | -39.9% | -50.6% |
| Market cap | $11.5B | $1.8B |
| P/E (trailing) | 52.4 | 10.8 |
| Dividend yield | 0.14% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | AEIS | PLAB |
|---|---|---|
| 2022 | -5.4% | -10.7% |
| 2023 | +27.5% | +86.4% |
| 2024 | +6.6% | -24.9% |
| 2025 | +81.6% | +35.8% |
| 2026 | +37.3% | -5.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are AEIS and PLAB good diversifiers for each other?
Somewhat, no more. With 0.51 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between AEIS and PLAB?
As of 2026-08-27, the correlation of weekly returns between AEIS and PLAB is 0.51 over 3 years, 0.40 over 1 year and 0.56 over 5 years.
Is PLAB a good diversifier for AEIS?
Somewhat, no more. With 0.51 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.51 mean?
On the −1 to +1 scale, 0.51 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/aeis-vs-plab.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/aeis-vs-plab/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: AEIS correlations · PLAB correlations
