ASB vs FIBK: Correlation
Associated Banc-Corp (ASB) and First Interstate BancSystem, Inc. (FIBK) show a very strong relationship: their 3-year correlation of weekly returns is 0.87.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ASB and FIBK?
Over the past 3 years, ASB and FIBK moved with a correlation of 0.87, which is very strong, meaning they move nearly in lockstep. Recent behaviour matches the longer record: 0.81 over 1 year against 0.87 over 3. Over 5 years the correlation is 0.82, and the annualized covariance of weekly returns is 766.8 %².
By 3-year correlation, FIBK places #12 of the 47 assets tracked against ASB. Neither side won the trailing year by much: +18.5% against +21.9%.
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.
ASB vs FIBK: side by side
| ASB (Associated Banc-Corp) | FIBK (First Interstate BancSystem, Inc.) | |
|---|---|---|
| 1-year return | +18.5% | +21.9% |
| 5-year return | +82.7% | +13.8% |
| Volatility (ann.) | 29.0% | 30.3% |
| Beta vs S&P 500 | 1.03 | 0.98 |
| Max drawdown (3Y) | -31.6% | -31.8% |
| Market cap | $5.8B | $3.6B |
| P/E (trailing) | 10.8 | 11.5 |
| Dividend yield | 3.08% | 5.05% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ASB | FIBK |
|---|---|---|
| 2022 | +6.0% | -0.8% |
| 2023 | -2.9% | -14.8% |
| 2024 | +16.2% | +12.9% |
| 2025 | +11.8% | +13.5% |
| 2026 | +21.7% | +11.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ASB and FIBK good diversifiers for each other?
No. With a correlation of 0.87, ASB and FIBK move nearly in lockstep, so holding both adds very little diversification.
FAQ
What is the correlation between ASB and FIBK?
Using weekly returns as of 2026-08-27: 0.87 over 3 years, with 0.81 over the last year and 0.82 over 5 years.
Is FIBK a good diversifier for ASB?
No. With a correlation of 0.87, ASB and FIBK move nearly in lockstep, so holding both adds very little diversification.
What does a correlation of 0.87 mean?
On the −1 to +1 scale, 0.87 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/asb-vs-fibk.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/asb-vs-fibk/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: ASB correlations · FIBK correlations
