EOSE vs KOPN: Correlation
Measured on weekly returns over the past three years, Eos Energy Enterprises, Inc. (EOSE) and Kopin Corporation (KOPN) carry a correlation of 0.41, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are EOSE and KOPN?
Across a 3-year window, the weekly returns of EOSE and KOPN correlate at 0.41, moderate. Recent behaviour matches the longer record: 0.49 over 1 year against 0.41 over 3. Stretching to 5 years gives 0.37, with an annualized covariance of 4218.7 %².
Among the 10 assets we track against EOSE, KOPN ranks #4 by 3-year correlation. Correlation aside, the last 12 months split them widely, with KOPN ahead by 175.1 points (-52.0% versus +123.1%).
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.
EOSE vs KOPN: side by side
| EOSE (Eos Energy Enterprises, Inc.) | KOPN (Kopin Corporation) | |
|---|---|---|
| 1-year return | -52.0% | +123.1% |
| 5-year return | -73.5% | -19.9% |
| Volatility (ann.) | 107.4% | 96.8% |
| Beta vs S&P 500 | 2.71 | 2.59 |
| Max drawdown (3Y) | -83.6% | -78.3% |
| Market cap | $1.2B | $0.9B |
| P/E (trailing) | – | 120.5 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | EOSE | KOPN |
|---|---|---|
| 2022 | -80.3% | -69.7% |
| 2023 | -26.4% | +63.7% |
| 2024 | +345.9% | -33.0% |
| 2025 | +135.8% | +72.1% |
| 2026 | -70.2% | +106.0% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are EOSE and KOPN good diversifiers for each other?
A fair diversifier. At 0.41, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between EOSE and KOPN?
As of 2026-08-27, the correlation of weekly returns between EOSE and KOPN is 0.41 over 3 years, 0.49 over 1 year and 0.37 over 5 years.
Is KOPN a good diversifier for EOSE?
A fair diversifier. At 0.41, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.41 mean?
On the −1 to +1 scale, 0.41 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/eose-vs-kopn.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/eose-vs-kopn/)
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Related comparisons
Hubs: EOSE correlations · KOPN correlations
