AEHR vs RMT: Correlation
Aehr Test Systems (AEHR) and Royce Micro-Cap Trust, Inc. (RMT) 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 RMT?
Across a 3-year window, the weekly returns of AEHR and RMT correlate at 0.44, moderate. The past 12 months show a tighter link (0.61) than the 3-year average (0.44). Stretching to 5 years gives 0.46, with an annualized covariance of 885.7 %².
By 3-year correlation, RMT places #6 of the 11 assets tracked against AEHR. Correlation aside, the last 12 months split them widely, with AEHR ahead by 223.9 points (+272.3% versus +48.4%). Note the risk asymmetry: AEHR runs 4.8 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 RMT: side by side
| AEHR (Aehr Test Systems) | RMT (Royce Micro-Cap Trust, Inc.) | |
|---|---|---|
| 1-year return | +272.3% | +48.4% |
| 5-year return | +1209.1% | +80.1% |
| Volatility (ann.) | 97.6% | 20.5% |
| Beta vs S&P 500 | 2.33 | 1.09 |
| Max drawdown (3Y) | -87.2% | -26.4% |
| Market cap | $3.0B | $0.8B |
| P/E (trailing) | – | 8.5 |
| Dividend yield | 0.00% | 5.57% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | AEHR | RMT |
|---|---|---|
| 2022 | -16.9% | -16.8% |
| 2023 | +32.0% | +15.8% |
| 2024 | -37.3% | +14.0% |
| 2025 | +21.4% | +16.1% |
| 2026 | +348.0% | +39.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are AEHR and RMT good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.44 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between AEHR and RMT?
Using weekly returns as of 2026-08-27: 0.44 over 3 years, with 0.61 over the last year and 0.46 over 5 years.
Is RMT a good diversifier for AEHR?
Yes, to a useful degree: a correlation of 0.44 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.44 mean?
A reading of 0.44 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/aehr-vs-rmt.json
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Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: AEHR correlations · RMT correlations
