First Interstate BancSystem, Inc. (FIBK) Seasonality
Recurring seasonal patterns for FIBK — the calendar windows where First Interstate BancSystem, Inc. has historically tended to rise or fall, with the win rate (how often it repeated) and average return for each, based on the last 10 years of price history.
FIBK seasonality at a glance
Over the last 10 years, FIBK's strongest seasonal window has been Feb 7 – Feb 17: it ended higher in 10 of 10 years (100% win rate) with an average return of +2.83% across a 10-day hold. On the weak side, FIBK has historically declined between Mar 5 – Apr 4, falling in 10 of 10 years (average -8.01%).
In total, our analysis finds 733 recurring seasonal windows for First Interstate BancSystem, Inc. — 485 bullish and 248 bearish. The next high-win-rate window, Aug 2 – Aug 22, opens in 6 days. These figures describe historical behaviour only — not a forecast.
FIBK's upcoming & recent seasonal patterns
Holding period:10-day20-day30-dayOrdered by season — windows opening soon first, plus a couple of recently completed high-performers. Holding-period colors help you compare durations at a glance.
| Status | Seasonal window | Hold | Avg return | Win rate | This year |
|---|---|---|---|---|---|
| Completedended 3d ago | Jun 24 – Jul 24 | 30d | +5.75% | 90% | +0.58% |
| Completedended 11d ago | Jun 26 – Jul 16 | 20d | +4.21% | 80% | +4.12% |
| Upcomingin 6d | Aug 2 – Aug 22 | 20d | +3.47% | 80% | — |
| Upcomingin 7d | Aug 3 – Aug 13 | 10d | +2.97% | 80% | — |
| Upcomingin 13d | Aug 9 – Aug 19 | 10d | +1.14% | 80% | — |
| Upcomingin 23d | Aug 19 – Sep 18 | 30d | +1.11% | 80% | — |
| Upcomingin 24d | Aug 20 – Sep 19 | 30d | +2.15% | 80% | — |
Win rate = how often the pattern repeated in the same direction. Average return = the mean move across all analysed years. Past performance does not guarantee future results.
Explore FIBK seasonality in full
See the seasonal curve chart, filter by win rate and return, and track upcoming windows — free during beta.
FIBK seasonality FAQ
What has historically been the best month to buy FIBK stock?
Based on the last 10 years of price data, FIBK's strongest seasonal window starts in February: Feb 7 to Feb 17, which ended higher in 10 of 10 years (100% win rate) with an average return of +2.83%. Past seasonal patterns do not guarantee future performance.
What is FIBK's strongest seasonal pattern?
FIBK's highest-win-rate pattern in our data is the Feb 7 – Feb 17 window (10-day hold): up in 10 of the last 10 years with an average move of +2.83%.
When has FIBK historically performed worst?
FIBK's weakest recurring window has been Mar 5 to Apr 4, declining in 10 of 10 years with an average return of -8.01%.
How reliable are FIBK's seasonal patterns?
Each FIBK pattern is scored by its historical win rate — the share of the last 10 years it repeated in the same direction. FIBK currently shows 733 recurring windows (485 bullish, 248 bearish). Seasonality describes historical tendencies only; it is not a prediction, and past performance does not guarantee future results.
What is FIBK stock seasonality?
Stock seasonality is the tendency of a stock to perform in a similar way during the same period each year. By analysing First Interstate BancSystem, Inc.'s price history across many years, SeasonalityX identifies recurring calendar windows — exact start and end dates — where FIBK has repeatedly risen (bullish) or fallen (bearish). Each pattern is scored by its win rate and average return so you can judge how reliable and how strong it has been.
Seasonality is one input among many — it works best alongside your own research and risk management. Learn more in our guide to seasonal analysis and the tutorials.