PairBook
HomeBY › BY vs WTBA

BY vs WTBA: Correlation

How closely do Byline Bancorp, Inc. (BY) and West Bancorporation (WTBA) trade together? Their weekly returns over three years give a correlation of 0.86, which is very strong.

Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology

Correlation (3Y)
0.86
very strong
Correlation (1Y)
0.82
last 12 months
Correlation (5Y)
0.78
long-run
Ann. covariance
705.1
%² · weekly, annualized

How correlated are BY and WTBA?

On 3 years of weekly data the BY/WTBA correlation comes out at 0.86, very strong, meaning they move nearly in lockstep. Recent behaviour matches the longer record: 0.82 over 1 year against 0.86 over 3. The 5-year figure is 0.78, and annualized covariance runs at 705.1 %².

By 3-year correlation, WTBA places #19 of the 70 assets tracked against BY. The last year tells two different stories: WTBA led by 15.4 percentage points, +32.5% for BY against +47.9% for WTBA.

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 WTBA: side by side

BY (Byline Bancorp, Inc.)WTBA (West Bancorporation)
1-year return+32.5%+47.9%
5-year return+66.2%+16.8%
Volatility (ann.)26.8%30.5%
Beta vs S&P 5000.800.75
Max drawdown (3Y)-27.2%-26.9%
Market cap$1.7B$0.5B
P/E (trailing)11.512.6
Dividend yield1.15%3.53%
Sector / categoryUS ListedUS Listed
Lower P/E: BY 11.5 vs 12.6Higher yield: WTBA 3.53% vs 1.15%Smaller drawdown: WTBA -26.9% vs -27.2%Higher 5y return: BY +66.2% vs +16.8%
-10%0%+53%2025-09-052026-08-27
Price paths over the last 12 months, both indexed to 100 at the start (weekly closes). BY · WTBA

Year-by-year returns

YearBYWTBA
2022-14.7%-14.4%
2023+4.3%-12.4%
2024+25.0%+7.7%
2025+2.0%+7.7%
2026+32.7%+31.7%

Calendar-year price returns; the current year is year-to-date as of the data date above.

Are BY and WTBA good diversifiers for each other?

No: a correlation of 0.86 means BY and WTBA tend to fall together, which is precisely when diversification is supposed to help.

FAQ

What is the correlation between BY and WTBA?

The BY/WTBA correlation stands at 0.86 on a 3-year window (1 year: 0.82, 5 years: 0.78), computed from weekly returns as of 2026-08-27.

Is WTBA a good diversifier for BY?

No: a correlation of 0.86 means BY and WTBA tend to fall together, which is precisely when diversification is supposed to help.

What does a correlation of 0.86 mean?

A reading of 0.86 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.

Use this data

JSON API · no key required
$ curl https://www.pairbook.io/api/v1/pairs/by-vs-wtba.json

BY vs WTBA: 3-year weekly correlation 0.86BY vs WTBA0.86

Embed this badge (it refreshes with the data), with attribution:

[![BY vs WTBA correlation](https://www.pairbook.io/api/v1/badge/by-vs-wtba.svg)](https://www.pairbook.io/pair/by-vs-wtba/)

The core API is free. Terms and every endpoint in the API documentation.

Related comparisons

Hubs: BY correlations · WTBA correlations