KOSS vs PSIX: Correlation
How closely do Koss Corporation (KOSS) and Power Solutions International, Inc. (PSIX) trade together? Their weekly returns over three years give a correlation of 0.40, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are KOSS and PSIX?
Across a 3-year window, the weekly returns of KOSS and PSIX correlate at 0.40, moderate. Lately the two have drifted apart, with the 1-year correlation at 0.21 versus 0.40 over 3 years. Stretching to 5 years gives 0.33, with an annualized covariance of 5448.9 %².
By 3-year correlation, PSIX places #4 of the 12 assets tracked against KOSS. Over the last 12 months KOSS came out ahead by 7.0 percentage points (-46.6% against -53.6%).
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.
KOSS vs PSIX: side by side
| KOSS (Koss Corporation) | PSIX (Power Solutions International, Inc.) | |
|---|---|---|
| 1-year return | -46.6% | -53.6% |
| 5-year return | -81.0% | +670.8% |
| Volatility (ann.) | 129.9% | 104.2% |
| Beta vs S&P 500 | 1.64 | 2.68 |
| Max drawdown (3Y) | -74.4% | -78.0% |
| Market cap | – | $0.9B |
| P/E (trailing) | – | 12.4 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | KOSS | PSIX |
|---|---|---|
| 2022 | -53.7% | +0.0% |
| 2023 | -32.3% | -31.7% |
| 2024 | +120.3% | +1351.2% |
| 2025 | -43.9% | +92.1% |
| 2026 | -17.4% | -33.9% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are KOSS and PSIX good diversifiers for each other?
Reasonably. At 0.40, KOSS and PSIX keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between KOSS and PSIX?
The KOSS/PSIX correlation stands at 0.40 on a 3-year window (1 year: 0.21, 5 years: 0.33), computed from weekly returns as of 2026-08-27.
Is PSIX a good diversifier for KOSS?
Reasonably. At 0.40, KOSS and PSIX keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.40 mean?
On the −1 to +1 scale, 0.40 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/koss-vs-psix.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/koss-vs-psix/)
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Related comparisons
Hubs: KOSS correlations · PSIX correlations
