COLB vs FIBK: Correlation
How closely do Columbia Banking System, Inc. (COLB) and First Interstate BancSystem, Inc. (FIBK) trade together? Their weekly returns over three years give a correlation of 0.82, which is very strong.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are COLB and FIBK?
Over the past 3 years, COLB and FIBK moved with a correlation of 0.82, which is very strong, meaning they move nearly in lockstep. Recent behaviour matches the longer record: 0.82 over 1 year against 0.82 over 3. Over 5 years the correlation is 0.76, and the annualized covariance of weekly returns is 879.1 %².
By 3-year correlation, FIBK places #4 of the 13 assets tracked against COLB. Their 12-month results are close: +18.3% for COLB against +21.9% for FIBK.
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.
COLB vs FIBK: side by side
| COLB (Columbia Banking System, Inc.) | FIBK (First Interstate BancSystem, Inc.) | |
|---|---|---|
| 1-year return | +18.3% | +21.9% |
| 5-year return | +9.4% | +13.8% |
| Volatility (ann.) | 35.2% | 30.3% |
| Beta vs S&P 500 | 1.01 | 0.98 |
| Max drawdown (3Y) | -36.4% | -31.8% |
| Market cap | $8.7B | $3.6B |
| P/E (trailing) | 12.1 | 11.5 |
| Dividend yield | 4.79% | 5.05% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | COLB | FIBK |
|---|---|---|
| 2022 | -4.3% | -0.8% |
| 2023 | -5.9% | -14.8% |
| 2024 | +8.1% | +12.9% |
| 2025 | +9.4% | +13.5% |
| 2026 | +12.6% | +11.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are COLB and FIBK good diversifiers for each other?
Not really. At 0.82, the two trade almost as one position, and owning both buys little extra protection.
FAQ
What is the correlation between COLB and FIBK?
As of 2026-08-27, the correlation of weekly returns between COLB and FIBK is 0.82 over 3 years, 0.82 over 1 year and 0.76 over 5 years.
Is FIBK a good diversifier for COLB?
Not really. At 0.82, the two trade almost as one position, and owning both buys little extra protection.
What does a correlation of 0.82 mean?
A reading of 0.82 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
$ curl https://www.pairbook.io/api/v1/pairs/colb-vs-fibk.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/colb-vs-fibk/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: COLB correlations · FIBK correlations
