BMRC vs BY: Correlation
Measured on weekly returns over the past three years, Bank of Marin Bancorp (BMRC) and Byline Bancorp, Inc. (BY) carry a correlation of 0.81, a very strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BMRC and BY?
Over the past 3 years, BMRC and BY moved with a correlation of 0.81, which is very strong, meaning they move nearly in lockstep. Lately the two have drifted apart, with the 1-year correlation at 0.71 versus 0.81 over 3 years. Over 5 years the correlation is 0.74, and the annualized covariance of weekly returns is 714.1 %².
In BMRC's tracked universe of 11 assets, BY sits right near the top at #2. Their recent paths diverged sharply: over the last 12 months BY outperformed by 19.8 percentage points (+12.7% for BMRC against +32.5% for BY).
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.
BMRC vs BY: side by side
| BMRC (Bank of Marin Bancorp) | BY (Byline Bancorp, Inc.) | |
|---|---|---|
| 1-year return | +12.7% | +32.5% |
| 5-year return | -8.2% | +66.2% |
| Volatility (ann.) | 33.0% | 26.8% |
| Beta vs S&P 500 | 0.75 | 0.80 |
| Max drawdown (3Y) | -35.2% | -27.2% |
| Market cap | $0.4B | $1.7B |
| P/E (trailing) | – | 11.5 |
| Dividend yield | 3.73% | 1.15% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BMRC | BY |
|---|---|---|
| 2022 | -9.1% | -14.7% |
| 2023 | -29.5% | +4.3% |
| 2024 | +13.9% | +25.0% |
| 2025 | +14.2% | +2.0% |
| 2026 | +5.6% | +32.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BMRC and BY good diversifiers for each other?
No: a correlation of 0.81 means BMRC and BY tend to fall together, which is precisely when diversification is supposed to help.
FAQ
What is the correlation between BMRC and BY?
As of 2026-08-27, the correlation of weekly returns between BMRC and BY is 0.81 over 3 years, 0.71 over 1 year and 0.74 over 5 years.
Is BY a good diversifier for BMRC?
No: a correlation of 0.81 means BMRC and BY tend to fall together, which is precisely when diversification is supposed to help.
What does a correlation of 0.81 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/bmrc-vs-by.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/bmrc-vs-by/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: BMRC correlations · BY correlations
