BY vs OPBK: Correlation
Measured on weekly returns over the past three years, Byline Bancorp, Inc. (BY) and OP Bancorp (OPBK) carry a correlation of 0.71, a strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BY and OPBK?
Across a 3-year window, the weekly returns of BY and OPBK correlate at 0.71, strong. Little has changed lately, as the 1-year reading of 0.74 lands near the 3-year figure. Stretching to 5 years gives 0.68, with an annualized covariance of 575.3 %².
Within BY's tracked universe of 70 assets, OPBK comes in at #50 by 3-year correlation. The last year tells two different stories: BY led by 21.9 percentage points, +32.5% for BY against +10.6% for OPBK.
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.
BY vs OPBK: side by side
| BY (Byline Bancorp, Inc.) | OPBK (OP Bancorp) | |
|---|---|---|
| 1-year return | +32.5% | +10.6% |
| 5-year return | +66.2% | +86.0% |
| Volatility (ann.) | 26.8% | 30.2% |
| Beta vs S&P 500 | 0.80 | 0.65 |
| Max drawdown (3Y) | -27.2% | -41.8% |
| Market cap | $1.7B | $0.2B |
| P/E (trailing) | 11.5 | 7.7 |
| Dividend yield | 1.15% | 3.33% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BY | OPBK |
|---|---|---|
| 2022 | -14.7% | -9.3% |
| 2023 | +4.3% | +3.2% |
| 2024 | +25.0% | +50.5% |
| 2025 | +2.0% | -7.4% |
| 2026 | +32.7% | +10.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BY and OPBK good diversifiers for each other?
Only partially. A correlation of 0.71 means BY and OPBK 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 BY and OPBK?
Using weekly returns as of 2026-08-27: 0.71 over 3 years, with 0.74 over the last year and 0.68 over 5 years.
Is OPBK a good diversifier for BY?
Only partially. A correlation of 0.71 means BY and OPBK share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.71 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/by-vs-opbk.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/by-vs-opbk/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: BY correlations · OPBK correlations
