AEHR vs KEYS: Correlation
Aehr Test Systems (AEHR) and Keysight Technologies (KEYS) show a moderate relationship: their 3-year correlation of weekly returns is 0.44.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are AEHR and KEYS?
Over the past 3 years, AEHR and KEYS moved with a correlation of 0.44, which is moderate. The link has tightened recently: the 1-year correlation (0.60) runs above the 3-year figure (0.44). Over 5 years the correlation is 0.44, and the annualized covariance of weekly returns is 1592.3 %².
Within AEHR's tracked universe of 11 assets, KEYS comes in at #4 by 3-year correlation. The last year tells two different stories: AEHR led by 174.9 percentage points, +272.3% for AEHR against +97.4% for KEYS. Note the risk asymmetry: AEHR runs 2.7 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
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.
AEHR vs KEYS: side by side
| AEHR (Aehr Test Systems) | KEYS (Keysight Technologies) | |
|---|---|---|
| 1-year return | +272.3% | +97.4% |
| 5-year return | +1209.1% | +81.9% |
| Volatility (ann.) | 97.6% | 36.8% |
| Beta vs S&P 500 | 2.33 | 1.58 |
| Max drawdown (3Y) | -87.2% | -31.4% |
| Market cap | $3.0B | $55.5B |
| P/E (trailing) | – | 43.5 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | Information Technology |
Year-by-year returns
| Year | AEHR | KEYS |
|---|---|---|
| 2022 | -16.9% | -17.2% |
| 2023 | +32.0% | -7.0% |
| 2024 | -37.3% | +1.0% |
| 2025 | +21.4% | +26.5% |
| 2026 | +348.0% | +60.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are AEHR and KEYS good diversifiers for each other?
A fair diversifier. At 0.44, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between AEHR and KEYS?
Using weekly returns as of 2026-08-27: 0.44 over 3 years, with 0.60 over the last year and 0.44 over 5 years.
Is KEYS a good diversifier for AEHR?
A fair diversifier. At 0.44, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.44 mean?
On the −1 to +1 scale, 0.44 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/aehr-vs-keys.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/aehr-vs-keys/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: AEHR correlations · KEYS correlations
