ISBA vs KELYA: Correlation
Measured on weekly returns over the past three years, Isabella Bank Corporation (ISBA) and Kelly Services, Inc. (KELYA) carry a correlation of -0.20, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ISBA and KELYA?
Across a 3-year window, the weekly returns of ISBA and KELYA correlate at -0.20, negative, meaning they tend to move in opposite directions. The relationship has been stable: the 1-year correlation (-0.15) sits close to the 3-year figure. Stretching to 5 years gives -0.08, with an annualized covariance of -252.2 %².
By 3-year correlation, KELYA places #9 of the 16 assets tracked against ISBA. The trailing year gives KELYA the advantage: +16.4% versus +24.2%, a 7.8-point spread.
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.
ISBA vs KELYA: side by side
| ISBA (Isabella Bank Corporation) | KELYA (Kelly Services, Inc.) | |
|---|---|---|
| 1-year return | +16.4% | +24.2% |
| 5-year return | +104.9% | -5.4% |
| Volatility (ann.) | 33.3% | 37.3% |
| Beta vs S&P 500 | 0.05 | 0.73 |
| Max drawdown (3Y) | -34.1% | -66.5% |
| Market cap | $0.3B | $0.6B |
| P/E (trailing) | 14.2 | – |
| Dividend yield | 2.91% | 1.77% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ISBA | KELYA |
|---|---|---|
| 2022 | -3.5% | +2.3% |
| 2023 | -3.5% | +30.0% |
| 2024 | +27.7% | -34.5% |
| 2025 | +99.1% | -35.2% |
| 2026 | -21.9% | +98.2% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ISBA and KELYA good diversifiers for each other?
Yes. With a correlation of -0.20, ISBA and KELYA have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between ISBA and KELYA?
The ISBA/KELYA correlation stands at -0.20 on a 3-year window (1 year: -0.15, 5 years: -0.08), computed from weekly returns as of 2026-08-27.
Is KELYA a good diversifier for ISBA?
Yes. With a correlation of -0.20, ISBA and KELYA have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.20 mean?
On the −1 to +1 scale, -0.20 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/isba-vs-kelya.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/isba-vs-kelya/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: ISBA correlations · KELYA correlations
