BY vs IBOC: Correlation
Byline Bancorp, Inc. (BY) and International Bancshares Corporation (IBOC) show a very strong relationship: their 3-year correlation of weekly returns is 0.86.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BY and IBOC?
Across a 3-year window, the weekly returns of BY and IBOC correlate at 0.86, very strong, meaning they move nearly in lockstep. Little has changed lately, as the 1-year reading of 0.87 lands near the 3-year figure. Stretching to 5 years gives 0.79, with an annualized covariance of 616.7 %².
By 3-year correlation, IBOC places #18 of the 70 assets tracked against BY. Their recent paths diverged sharply: over the last 12 months BY outperformed by 33.4 percentage points (+32.5% for BY against -0.9% for IBOC).
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 IBOC: side by side
| BY (Byline Bancorp, Inc.) | IBOC (International Bancshares Corporation) | |
|---|---|---|
| 1-year return | +32.5% | -0.9% |
| 5-year return | +66.2% | +91.3% |
| Volatility (ann.) | 26.8% | 26.9% |
| Beta vs S&P 500 | 0.80 | 0.77 |
| Max drawdown (3Y) | -27.2% | -24.1% |
| Market cap | $1.7B | $4.4B |
| P/E (trailing) | 11.5 | 10.7 |
| Dividend yield | 1.15% | 2.02% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BY | IBOC |
|---|---|---|
| 2022 | -14.7% | +10.9% |
| 2023 | +4.3% | +22.0% |
| 2024 | +25.0% | +19.1% |
| 2025 | +2.0% | +7.4% |
| 2026 | +32.7% | +8.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BY and IBOC good diversifiers for each other?
Not really. At 0.86, the two trade almost as one position, and owning both buys little extra protection.
FAQ
What is the correlation between BY and IBOC?
The BY/IBOC correlation stands at 0.86 on a 3-year window (1 year: 0.87, 5 years: 0.79), computed from weekly returns as of 2026-08-27.
Is IBOC a good diversifier for BY?
Not really. At 0.86, the two trade almost as one position, and owning both buys little extra protection.
What does a correlation of 0.86 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-iboc.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/by-vs-iboc/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: BY correlations · IBOC correlations
