DIOD vs RELL: Correlation
Diodes Incorporated (DIOD) and Richardson Electronics, Ltd. (RELL) 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 DIOD and RELL?
Over the past 3 years, DIOD and RELL moved with a correlation of 0.44, which is moderate. Little has changed lately, as the 1-year reading of 0.49 lands near the 3-year figure. Over 5 years the correlation is 0.41, and the annualized covariance of weekly returns is 927.6 %².
RELL is close to the least connected end of DIOD's tracked universe, ranking #22 of 25. Correlation aside, the last 12 months split them widely, with RELL ahead by 23.9 points (+61.7% versus +85.6%).
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.
DIOD vs RELL: side by side
| DIOD (Diodes Incorporated) | RELL (Richardson Electronics, Ltd.) | |
|---|---|---|
| 1-year return | +61.7% | +85.6% |
| 5-year return | -7.4% | +131.1% |
| Volatility (ann.) | 50.3% | 42.1% |
| Beta vs S&P 500 | 1.84 | 0.78 |
| Max drawdown (3Y) | -60.1% | -45.1% |
| Market cap | $4.2B | $0.3B |
| P/E (trailing) | 48.6 | 40.0 |
| Dividend yield | 0.00% | 1.35% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | DIOD | RELL |
|---|---|---|
| 2022 | -30.7% | +60.3% |
| 2023 | +5.8% | -36.4% |
| 2024 | -23.4% | +7.4% |
| 2025 | -20.0% | -20.6% |
| 2026 | +84.2% | +67.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are DIOD and RELL good diversifiers for each other?
Reasonably. At 0.44, DIOD and RELL keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between DIOD and RELL?
The DIOD/RELL correlation stands at 0.44 on a 3-year window (1 year: 0.49, 5 years: 0.41), computed from weekly returns as of 2026-08-27.
Is RELL a good diversifier for DIOD?
Reasonably. At 0.44, DIOD and RELL keep a meaningful degree of independence, and combining them has historically reduced portfolio 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/diod-vs-rell.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/diod-vs-rell/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: DIOD correlations · RELL correlations
