MWA vs PSIX: Correlation
Measured on weekly returns over the past three years, MUELLER WATER PRODUCTS (MWA) and Power Solutions International, Inc. (PSIX) 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 MWA and PSIX?
Over the past 3 years, MWA and PSIX moved with a correlation of 0.41, which is moderate. The past 12 months show a tighter link (0.51) than the 3-year average (0.41). Over 5 years the correlation is 0.26, and the annualized covariance of weekly returns is 1345.3 %².
Among the 11 assets we track against MWA, PSIX sits near the bottom by co-movement, at rank #7. The last year tells two different stories: MWA led by 45.2 percentage points, -8.4% for MWA against -53.6% for PSIX. Risk is not evenly split, since PSIX carries 3.3 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.
MWA vs PSIX: side by side
| MWA (MUELLER WATER PRODUCTS) | PSIX (Power Solutions International, Inc.) | |
|---|---|---|
| 1-year return | -8.4% | -53.6% |
| 5-year return | +59.7% | +670.8% |
| Volatility (ann.) | 31.5% | 104.2% |
| Beta vs S&P 500 | 0.96 | 2.68 |
| Max drawdown (3Y) | -19.2% | -78.0% |
| Market cap | $3.9B | $0.9B |
| P/E (trailing) | 17.4 | 12.4 |
| Dividend yield | 1.10% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | MWA | PSIX |
|---|---|---|
| 2022 | -23.8% | +0.0% |
| 2023 | +36.3% | -31.7% |
| 2024 | +58.4% | +1351.2% |
| 2025 | +7.0% | +92.1% |
| 2026 | +4.6% | -33.9% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are MWA and PSIX 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 MWA and PSIX?
The MWA/PSIX correlation stands at 0.41 on a 3-year window (1 year: 0.51, 5 years: 0.26), computed from weekly returns as of 2026-08-27.
Is PSIX a good diversifier for MWA?
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?
A reading of 0.41 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/mwa-vs-psix.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/mwa-vs-psix/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: MWA correlations · PSIX correlations
