FIBK vs SRBK: Correlation
First Interstate BancSystem, Inc. (FIBK) and SR Bancorp, Inc. (SRBK) show a moderate relationship: their 3-year correlation of weekly returns is 0.53.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are FIBK and SRBK?
On 3 years of weekly data the FIBK/SRBK correlation comes out at 0.53, moderate. The link has tightened recently: the 1-year correlation (0.70) runs above the 3-year figure (0.53). The 5-year figure is n/a, and annualized covariance runs at 275.6 %².
By 3-year correlation, SRBK places #12 of the 20 assets tracked against FIBK. On 12-month performance SRBK holds a 8.4-point edge, +21.9% against +30.3%. Risk is not evenly split, since FIBK carries 1.7 times the volatility of the other side.
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.
FIBK vs SRBK: side by side
| FIBK (First Interstate BancSystem, Inc.) | SRBK (SR Bancorp, Inc.) | |
|---|---|---|
| 1-year return | +21.9% | +30.3% |
| 5-year return | +13.8% | n/a |
| Volatility (ann.) | 30.3% | 17.4% |
| Beta vs S&P 500 | 0.98 | 0.36 |
| Max drawdown (3Y) | -31.8% | -13.5% |
| Market cap | $3.6B | $0.1B |
| P/E (trailing) | 11.5 | 44.3 |
| Dividend yield | 5.05% | 1.08% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | FIBK | SRBK |
|---|---|---|
| 2022 | -0.8% | – |
| 2023 | -14.8% | – |
| 2024 | +12.9% | +24.6% |
| 2025 | +13.5% | +34.1% |
| 2026 | +11.8% | +24.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are FIBK and SRBK good diversifiers for each other?
Somewhat, no more. With 0.53 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between FIBK and SRBK?
The FIBK/SRBK correlation stands at 0.53 on a 3-year window (1 year: 0.70, 5 years: n/a), computed from weekly returns as of 2026-08-27.
Is SRBK a good diversifier for FIBK?
Somewhat, no more. With 0.53 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.53 mean?
A reading of 0.53 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/fibk-vs-srbk.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/fibk-vs-srbk/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: FIBK correlations · SRBK correlations
