ERII vs MBC: Correlation
Measured on weekly returns over the past three years, Energy Recovery, Inc. (ERII) and MasterBrand, Inc. (MBC) carry a correlation of 0.51, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ERII and MBC?
Over the past 3 years, ERII and MBC moved with a correlation of 0.51, which is moderate. The relationship has been stable: the 1-year correlation (0.47) sits close to the 3-year figure. Over 5 years the correlation is 0.46, and the annualized covariance of weekly returns is 1143.2 %².
MBC is one of the assets that tracks ERII most closely: it ranks #2 out of the 11 assets we track against ERII. Over the last 12 months MBC came out ahead by 12.0 percentage points (-45.8% against -33.8%).
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.
ERII vs MBC: side by side
| ERII (Energy Recovery, Inc.) | MBC (MasterBrand, Inc.) | |
|---|---|---|
| 1-year return | -45.8% | -33.8% |
| 5-year return | -60.7% | n/a |
| Volatility (ann.) | 51.2% | 43.7% |
| Beta vs S&P 500 | 1.44 | 1.16 |
| Max drawdown (3Y) | -72.4% | -64.7% |
| Market cap | $0.4B | $1.8B |
| P/E (trailing) | 30.4 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ERII | MBC |
|---|---|---|
| 2022 | -4.7% | – |
| 2023 | -8.1% | +96.7% |
| 2024 | -22.0% | -1.6% |
| 2025 | -8.2% | -24.4% |
| 2026 | -41.4% | -21.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ERII and MBC good diversifiers for each other?
Only partially. A correlation of 0.51 means ERII and MBC share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
FAQ
What is the correlation between ERII and MBC?
The ERII/MBC correlation stands at 0.51 on a 3-year window (1 year: 0.47, 5 years: 0.46), computed from weekly returns as of 2026-08-27.
Is MBC a good diversifier for ERII?
Only partially. A correlation of 0.51 means ERII and MBC share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.51 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/erii-vs-mbc.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/erii-vs-mbc/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: ERII correlations · MBC correlations
