FIBK Butterfly Strategy
FIBK (First Interstate BancSystem, Inc.), in the Financial Services sector, (Banks - Regional industry), listed on NASDAQ.
First Interstate BancSystem, Inc. operates as the bank holding company for First Interstate Bank that provides range of banking products and services in the United States. It offers various traditional depository products, including checking, savings, and time deposits; and repurchase agreements primarily for commercial and municipal depositors. The company also offers real estate loans comprising commercial real estate, construction, residential, agricultural, and other real estate loans; consumer loans comprising direct personal loans, credit card loans and lines of credit, and indirect loans; variable and fixed rate commercial loans for small and medium-sized manufacturing, wholesale, retail, and service businesses for working capital needs and business expansions; and agricultural loans. In addition, it provides a range of trust, employee benefit, investment management, insurance, agency, and custodial services to individuals, businesses, and nonprofit organizations. Further, the company offers marketing, credit review, loan servicing, credit cards issuance and servicing, mortgage loan sales and servicing, indirect consumer loan purchasing and processing, loan collection services, and other operational services, as well as online and mobile banking services. It serves individuals, businesses, municipalities, and other entities in various industries, including agriculture, construction, education, energy, governmental services, healthcare, hospitality, housing, mining, professional services, real estate development, retail, technology, tourism, and wholesale trade.
FIBK (First Interstate BancSystem, Inc.) trades in the Financial Services sector, specifically Banks - Regional, with a market capitalization of approximately $3.31B, a trailing P/E of 10.81, a beta of 0.75 versus the broader market, a 52-week range of 25.81-39.26, average daily share volume of 1.2M, a public-listing history dating back to 2010, approximately 3K full-time employees. These structural characteristics shape how FIBK stock options price implied volatility around earnings windows, capital events, and macro-driven sector rotations.
A beta of 0.75 places FIBK roughly in line with broader market moves, so the strategy payoff and realized volatility track the index-equivalent baseline. The trailing P/E of 10.81 is on the value side, where IV often compresses outside event windows because forward growth expectations are already discounted into the share price. FIBK pays a dividend, which adjusts put-call parity and shifts the ex-dividend pricing across the listed chain.
What is a butterfly on FIBK?
A long call butterfly buys one lower-strike call, sells two ATM calls, and buys one higher-strike call, paying a small net debit for a defined-risk position that maxes out if the underlying pins the middle strike at expiration.
Current FIBK snapshot
As of May 15, 2026, spot at $34.09, ATM IV 34.20%, IV rank 5.36%, expected move 9.80%. The butterfly on FIBK below is built from the same end-of-day chain, with strikes snapped to listed contracts and premiums pulled from the bid/ask midpoint at a 34-day expiry.
Why this butterfly structure on FIBK specifically: FIBK IV at 34.20% is on the cheap side of its 1-year range, which favors premium-buying structures like a FIBK butterfly, with a market-implied 1-standard-deviation move of approximately 9.80% (roughly $3.34 on the underlying). The 34-day window matched to the front-month expiry keeps theta exposure bounded while still capturing the post-snapshot move; longer-dated FIBK expiries trade a higher absolute premium for lower per-day decay. Position sizing on FIBK should anchor to the underlying notional of $34.09 per share and to the trader's directional view on FIBK stock.
FIBK butterfly setup
The FIBK butterfly below is built from the end-of-day chain, with each option leg priced at the bid/ask midpoint of its listed strike. With FIBK near $34.09, the first option leg uses a $32.39 strike; additional legs (when the strategy has them) anchor to spot-relative offsets. Premiums come from the bid/ask midpoint on the listed FIBK chain at a 34-day expiry; the cross-strike IV skew is reflected directly in the per-leg values rather than approximated. Quantity sizing assumes one contract per option leg (or 100 FIBK shares for the stock leg in covered calls and collars).
| Action | Type | Strike / Basis | Premium (est) |
|---|---|---|---|
| Buy 1 | Call | $32.39 | N/A |
| Sell 2 | Call | $34.09 | N/A |
| Buy 1 | Call | $35.79 | N/A |
FIBK butterfly risk and reward
- Net Premium / Debit
- N/A
- Max Profit (per contract)
- Unbounded
- Max Loss (per contract)
- Unbounded
- Breakeven(s)
- None on modeled curve
- Risk / Reward Ratio
- N/A
Max profit equals the wing width minus net debit times 100 (reached when the underlying pins the middle strike); max loss equals the net debit times 100. Two breakevens at lower-wing plus debit and upper-wing minus debit.
FIBK butterfly payoff curve
Modeled P&L at expiration across a range of underlying prices for the butterfly on FIBK. Each row is one sampled price point from the computed payoff curve; the full curve uses 200 price points internally before being summarized into 10 rows here.
When traders use butterfly on FIBK
Butterflies on FIBK are pinning bets - traders use them when they expect FIBK to settle near a specific level at expiration (often the prior close, a round number, or the max-pain strike) and want defined-risk exposure to that outcome.
FIBK thesis for this butterfly
The market-implied 1-standard-deviation range for FIBK extends from approximately $30.75 on the downside to $37.43 on the upside. A FIBK long call butterfly is a pinning play: it pays maximum at the middle strike if FIBK settles there at expiration, with the wing legs capping both the cost and the maximum loss to the net debit. Current FIBK IV rank near 5.36% sits in the lower third of its 1-year distribution, where IV often re-expands toward the mean; this favors premium-buying structures and disadvantages premium-selling structures on FIBK at 34.20%. As a Financial Services name, FIBK options can move on sector-level news flow (peer earnings, regulatory updates, industry-specific macro data) in addition to FIBK-specific events.
FIBK butterfly positions are structurally neutral / pin (limited-risk, limited-reward); the modeled P&L assumes European-style exercise at expiration and ignores early assignment, transaction costs, dividends paid before expiry on the stock leg (when present), and the bid-ask spread on the listed chain. FIBK positions also carry Financial Services sector concentration risk; news flow inside the sector (peer earnings, regulatory shifts, supply-chain headlines) can move FIBK alongside the broader basket even when FIBK-specific fundamentals are unchanged. Always rebuild the position from current FIBK chain quotes before placing a trade.
Frequently asked questions
- What is a butterfly on FIBK?
- A butterfly on FIBK is the butterfly strategy applied to FIBK (stock). The strategy is structurally neutral / pin (limited-risk, limited-reward): A long call butterfly buys one lower-strike call, sells two ATM calls, and buys one higher-strike call, paying a small net debit for a defined-risk position that maxes out if the underlying pins the middle strike at expiration. With FIBK stock trading near $34.09, the strikes shown on this page are snapped to the nearest listed FIBK chain strike and the premiums come straight from the end-of-day bid/ask midpoint.
- How are FIBK butterfly max profit and max loss calculated?
- Max profit equals the wing width minus net debit times 100 (reached when the underlying pins the middle strike); max loss equals the net debit times 100. Two breakevens at lower-wing plus debit and upper-wing minus debit. For the FIBK butterfly priced from the end-of-day chain at a 30-day expiry (ATM IV 34.20%), the computed maximum profit is unbounded per contract and the computed maximum loss is unbounded per contract. Live intraday quotes will differ as the chain moves through the trading session.
- What is the breakeven for a FIBK butterfly?
- The breakeven for the FIBK butterfly priced on this page is no defined breakeven on the modeled curve at expiration, derived from end-of-day chain premiums. Breakeven is the underlying price at which the strategy's P&L crosses zero ignoring transaction costs and assignment risk. The current FIBK market-implied 1-standard-deviation expected move is approximately 9.80%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.
- When should you consider a butterfly on FIBK?
- Butterflies on FIBK are pinning bets - traders use them when they expect FIBK to settle near a specific level at expiration (often the prior close, a round number, or the max-pain strike) and want defined-risk exposure to that outcome.
- How does current FIBK implied volatility affect this butterfly?
- FIBK ATM IV is at 34.20% with IV rank near 5.36%, which is on the low end of its 1-year range. Premium-buying structures (long call, long put, debit spreads) are relatively cheap in this regime; premium-selling structures collect less credit per unit risk.