FIBK vs FNB: Correlation
Measured on weekly returns over the past three years, First Interstate BancSystem, Inc. (FIBK) and F.N.B. Corporation (FNB) carry a correlation of 0.86, a very strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are FIBK and FNB?
Across a 3-year window, the weekly returns of FIBK and FNB correlate at 0.86, very strong, meaning they move nearly in lockstep. Recent behaviour matches the longer record: 0.83 over 1 year against 0.86 over 3. Stretching to 5 years gives 0.79, with an annualized covariance of 716.7 %².
Among the 20 assets we track against FIBK, FNB ranks #4 by 3-year correlation. On 12-month performance FIBK holds a 8.5-point edge, +21.9% against +13.4%.
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 FNB: side by side
| FIBK (First Interstate BancSystem, Inc.) | FNB (F.N.B. Corporation) | |
|---|---|---|
| 1-year return | +21.9% | +13.4% |
| 5-year return | +13.8% | +91.1% |
| Volatility (ann.) | 30.3% | 27.4% |
| Beta vs S&P 500 | 0.98 | 1.03 |
| Max drawdown (3Y) | -31.8% | -32.6% |
| Market cap | $3.6B | $6.6B |
| P/E (trailing) | 11.5 | 11.0 |
| Dividend yield | 5.05% | 2.65% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | FIBK | FNB |
|---|---|---|
| 2022 | -0.8% | +11.7% |
| 2023 | -14.8% | +9.8% |
| 2024 | +12.9% | +11.0% |
| 2025 | +13.5% | +19.4% |
| 2026 | +11.8% | +9.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are FIBK and FNB good diversifiers for each other?
No. With a correlation of 0.86, FIBK and FNB move nearly in lockstep, so holding both adds very little diversification.
FAQ
What is the correlation between FIBK and FNB?
The FIBK/FNB correlation stands at 0.86 on a 3-year window (1 year: 0.83, 5 years: 0.79), computed from weekly returns as of 2026-08-27.
Is FNB a good diversifier for FIBK?
No. With a correlation of 0.86, FIBK and FNB move nearly in lockstep, so holding both adds very little diversification.
What does a correlation of 0.86 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/fibk-vs-fnb.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/fibk-vs-fnb/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: FIBK correlations · FNB correlations
