MSEX vs YORW: Correlation
Middlesex Water Company (MSEX) and The York Water Company (YORW) show a strong relationship: their 3-year correlation of weekly returns is 0.77.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are MSEX and YORW?
Across a 3-year window, the weekly returns of MSEX and YORW correlate at 0.77, strong. Little has changed lately, as the 1-year reading of 0.74 lands near the 3-year figure. Stretching to 5 years gives 0.71, with an annualized covariance of 498.8 %².
Few assets follow MSEX as closely as YORW, which ranks #2 of 14 tracked partners. Twelve-month performance is nearly a tie, at +10.1% for MSEX and +10.9% for YORW. One caveat on sizing: MSEX is 1.5 times as volatile as the other leg, so an equal-dollar split is far from equal-risk.
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.
MSEX vs YORW: side by side
| MSEX (Middlesex Water Company) | YORW (The York Water Company) | |
|---|---|---|
| 1-year return | +10.1% | +10.9% |
| 5-year return | -41.5% | -26.0% |
| Volatility (ann.) | 31.5% | 20.5% |
| Beta vs S&P 500 | 0.04 | 0.18 |
| Max drawdown (3Y) | -40.2% | -26.4% |
| Market cap | $1.1B | $0.5B |
| P/E (trailing) | 22.6 | 21.2 |
| Dividend yield | 2.43% | 2.64% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | MSEX | YORW |
|---|---|---|
| 2022 | -33.8% | -7.9% |
| 2023 | -15.2% | -12.4% |
| 2024 | -18.0% | -13.2% |
| 2025 | -1.7% | +0.1% |
| 2026 | +17.0% | +7.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are MSEX and YORW good diversifiers for each other?
Somewhat, no more. With 0.77 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between MSEX and YORW?
The MSEX/YORW correlation stands at 0.77 on a 3-year window (1 year: 0.74, 5 years: 0.71), computed from weekly returns as of 2026-08-27.
Is YORW a good diversifier for MSEX?
Somewhat, no more. With 0.77 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.77 mean?
A reading of 0.77 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/msex-vs-yorw.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/msex-vs-yorw/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: MSEX correlations · YORW correlations
