AEHR vs ED: Correlation
Measured on weekly returns over the past three years, Aehr Test Systems (AEHR) and Consolidated Edison (ED) carry a correlation of -0.21, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are AEHR and ED?
Over the past 3 years, AEHR and ED moved with a correlation of -0.21, which is negative, meaning they tend to move in opposite directions. Recent behaviour matches the longer record: -0.23 over 1 year against -0.21 over 3. Over 5 years the correlation is -0.11, and the annualized covariance of weekly returns is -337.4 %².
Among the 11 assets we track against AEHR, ED sits near the bottom by co-movement, at rank #9. Correlation aside, the last 12 months split them widely, with AEHR ahead by 262.1 points (+272.3% versus +10.2%). Risk is not evenly split, since AEHR carries 5.9 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.
AEHR vs ED: side by side
| AEHR (Aehr Test Systems) | ED (Consolidated Edison) | |
|---|---|---|
| 1-year return | +272.3% | +10.2% |
| 5-year return | +1209.1% | +67.5% |
| Volatility (ann.) | 97.6% | 16.5% |
| Beta vs S&P 500 | 2.33 | -0.21 |
| Max drawdown (3Y) | -87.2% | -17.4% |
| Market cap | $3.0B | $39.5B |
| P/E (trailing) | – | 17.5 |
| Dividend yield | 0.00% | 3.22% |
| Sector / category | US Listed | Utilities |
Year-by-year returns
| Year | AEHR | ED |
|---|---|---|
| 2022 | -16.9% | +15.7% |
| 2023 | +32.0% | -1.1% |
| 2024 | -37.3% | +1.5% |
| 2025 | +21.4% | +15.1% |
| 2026 | +348.0% | +10.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are AEHR and ED good diversifiers for each other?
By historical standards, yes. A correlation of -0.21 means the two rarely move for the same reasons.
FAQ
What is the correlation between AEHR and ED?
As of 2026-08-27, the correlation of weekly returns between AEHR and ED is -0.21 over 3 years, -0.23 over 1 year and -0.11 over 5 years.
Is ED a good diversifier for AEHR?
By historical standards, yes. A correlation of -0.21 means the two rarely move for the same reasons.
What does a correlation of -0.21 mean?
On the −1 to +1 scale, -0.21 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.
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Related comparisons
Hubs: AEHR correlations · ED correlations
