ACHR vs KOPN: Correlation
Archer Aviation Inc. (ACHR) and Kopin Corporation (KOPN) show a moderate relationship: their 3-year correlation of weekly returns is 0.47.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ACHR and KOPN?
Over the past 3 years, ACHR and KOPN moved with a correlation of 0.47, which is moderate. Lately the two have moved closer together, with the 1-year correlation at 0.65 versus 0.47 over 3 years. Over 5 years the correlation is 0.43, and the annualized covariance of weekly returns is 4012.7 %².
Within ACHR's tracked universe of 26 assets, KOPN comes in at #16 by 3-year correlation. Correlation aside, the last 12 months split them widely, with KOPN ahead by 158.3 points (-35.2% 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.
ACHR vs KOPN: side by side
| ACHR (Archer Aviation Inc.) | KOPN (Kopin Corporation) | |
|---|---|---|
| 1-year return | -35.2% | +123.1% |
| 5-year return | -40.7% | -19.9% |
| Volatility (ann.) | 87.9% | 96.8% |
| Beta vs S&P 500 | 3.18 | 2.59 |
| Max drawdown (3Y) | -67.4% | -78.3% |
| Market cap | $4.6B | $0.9B |
| P/E (trailing) | – | 120.5 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ACHR | KOPN |
|---|---|---|
| 2022 | -69.0% | -69.7% |
| 2023 | +228.3% | +63.7% |
| 2024 | +58.8% | -33.0% |
| 2025 | -22.9% | +72.1% |
| 2026 | -21.1% | +106.0% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ACHR and KOPN good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.47 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between ACHR and KOPN?
The ACHR/KOPN correlation stands at 0.47 on a 3-year window (1 year: 0.65, 5 years: 0.43), computed from weekly returns as of 2026-08-27.
Is KOPN a good diversifier for ACHR?
Yes, to a useful degree: a correlation of 0.47 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.47 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/achr-vs-kopn.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/achr-vs-kopn/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: ACHR correlations · KOPN correlations
