BLIN vs KOSS: Correlation
Bridgeline Digital, Inc. (BLIN) and Koss Corporation (KOSS) show a negative relationship: their 3-year correlation of weekly returns is -0.18.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BLIN and KOSS?
On 3 years of weekly data the BLIN/KOSS correlation comes out at -0.18, negative, meaning they tend to move in opposite directions. The link has tightened recently: the 1-year correlation (0.16) runs above the 3-year figure (-0.18). The 5-year figure is -0.05, and annualized covariance runs at -1385.9 %².
Out of 10 assets tracked against BLIN, KOSS lands near the bottom at #8. Correlation aside, the last 12 months split them widely, with BLIN ahead by 19.7 points (-26.9% versus -46.6%). Note the risk asymmetry: KOSS runs 2.2 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.
BLIN vs KOSS: side by side
| BLIN (Bridgeline Digital, Inc.) | KOSS (Koss Corporation) | |
|---|---|---|
| 1-year return | -26.9% | -46.6% |
| 5-year return | -81.9% | -81.0% |
| Volatility (ann.) | 60.1% | 129.9% |
| Beta vs S&P 500 | 0.36 | 1.64 |
| Max drawdown (3Y) | -70.2% | -74.4% |
| Market cap | – | – |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BLIN | KOSS |
|---|---|---|
| 2022 | -53.5% | -53.7% |
| 2023 | -17.1% | -32.3% |
| 2024 | +81.6% | +120.3% |
| 2025 | -47.5% | -43.9% |
| 2026 | +19.0% | -17.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BLIN and KOSS good diversifiers for each other?
Yes. With a correlation of -0.18, BLIN and KOSS have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between BLIN and KOSS?
As of 2026-08-27, the correlation of weekly returns between BLIN and KOSS is -0.18 over 3 years, 0.16 over 1 year and -0.05 over 5 years.
Is KOSS a good diversifier for BLIN?
Yes. With a correlation of -0.18, BLIN and KOSS have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.18 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/blin-vs-koss.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/blin-vs-koss/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: BLIN correlations · KOSS correlations
