KOPN vs SPY: Correlation
How closely do Kopin Corporation (KOPN) and SPDR S&P 500 ETF Trust (SPY) trade together? Their weekly returns over three years give a correlation of 0.39, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are KOPN and SPY?
On 3 years of weekly data the KOPN/SPY correlation comes out at 0.39, moderate. Lately the two have moved closer together, with the 1-year correlation at 0.58 versus 0.39 over 3 years. The 5-year figure is 0.42, and annualized covariance runs at 541.8 %².
Within KOPN's tracked universe of 15 assets, SPY comes in at #10 by 3-year correlation. Their recent paths diverged sharply: over the last 12 months KOPN outperformed by 102.5 percentage points (+123.1% for KOPN against +20.6% for SPY). Risk is not evenly split, since KOPN carries 6.7 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.
KOPN vs SPY: side by side
| KOPN (Kopin Corporation) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | +123.1% | +20.6% |
| 5-year return | -19.9% | +82.4% |
| Volatility (ann.) | 96.8% | 14.5% |
| Beta vs S&P 500 | 2.59 | 1.00 |
| Max drawdown (3Y) | -78.3% | -18.8% |
| Market cap | $0.9B | – |
| P/E (trailing) | 120.5 | – |
| Dividend yield | 0.00% | 1.01% |
| Expense ratio | – | 0.09% |
| Assets under management | – | $795.3B |
| Sector / category | US Listed | ETF · US Large Cap |
SPY is a Large Blend fund from State Street Investment Management: $795.3B under management, 504 holdings, a 0.09% expense ratio, a 1.01% trailing dividend yield.
Year-by-year returns
| Year | KOPN | SPY |
|---|---|---|
| 2022 | -69.7% | -18.2% |
| 2023 | +63.7% | +26.2% |
| 2024 | -33.0% | +24.9% |
| 2025 | +72.1% | +17.7% |
| 2026 | +106.0% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are KOPN and SPY good diversifiers for each other?
A fair diversifier. At 0.39, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between KOPN and SPY?
The KOPN/SPY correlation stands at 0.39 on a 3-year window (1 year: 0.58, 5 years: 0.42), computed from weekly returns as of 2026-08-27.
Is SPY a good diversifier for KOPN?
A fair diversifier. At 0.39, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.39 mean?
A reading of 0.39 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/kopn-vs-spy.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/kopn-vs-spy/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: KOPN correlations · SPY correlations
