COO vs SFBC: Correlation
Cooper Companies (The) (COO) and Sound Financial Bancorp, Inc. (SFBC) show a moderate relationship: their 3-year correlation of weekly returns is 0.34.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are COO and SFBC?
Over the past 3 years, COO and SFBC moved with a correlation of 0.34, which is moderate. Lately the two have drifted apart, with the 1-year correlation at 0.24 versus 0.34 over 3 years. Over 5 years the correlation is 0.19, and the annualized covariance of weekly returns is 207.9 %².
By 3-year correlation, SFBC places #26 of the 38 assets tracked against COO. Neither side won the trailing year by much: -4.3% against +0.4%.
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.
COO vs SFBC: side by side
| COO (Cooper Companies (The)) | SFBC (Sound Financial Bancorp, Inc.) | |
|---|---|---|
| 1-year return | -4.3% | +0.4% |
| 5-year return | -36.8% | +19.0% |
| Volatility (ann.) | 27.7% | 22.4% |
| Beta vs S&P 500 | 0.69 | 0.17 |
| Max drawdown (3Y) | -47.0% | -24.7% |
| Market cap | – | $0.1B |
| P/E (trailing) | 61.7 | 15.2 |
| Dividend yield | 0.00% | 1.69% |
| Sector / category | Health Care | US Listed |
Year-by-year returns
| Year | COO | SFBC |
|---|---|---|
| 2022 | -21.1% | -9.0% |
| 2023 | +14.5% | +1.3% |
| 2024 | -2.8% | +37.4% |
| 2025 | -10.8% | -15.8% |
| 2026 | -13.4% | +10.0% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are COO and SFBC good diversifiers for each other?
Reasonably. At 0.34, COO and SFBC keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between COO and SFBC?
Using weekly returns as of 2026-08-27: 0.34 over 3 years, with 0.24 over the last year and 0.19 over 5 years.
Is SFBC a good diversifier for COO?
Reasonably. At 0.34, COO and SFBC keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.34 mean?
On the −1 to +1 scale, 0.34 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/coo-vs-sfbc.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/coo-vs-sfbc/)
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Related comparisons
Hubs: COO correlations · SFBC correlations
