BMRC Butterfly Strategy
BMRC (Bank of Marin Bancorp), in the Financial Services sector, (Banks - Regional industry), listed on NASDAQ.
Bank of Marin Bancorp operates as the holding company for Bank of Marin that provides a range of financial services primarily to small to medium-sized businesses, professionals, not-for-profit organizations, and individuals in California, the United States. It offers personal and business checking and savings accounts; and individual retirement, health savings, and demand deposit marketplace accounts, as well as time certificates of deposit, certificate of deposit account registry and insured cash sweep services. The company also provides commercial real estate, commercial and industrial, and consumer loans, as well as construction financing and home equity lines of credit. In addition, it offers merchant and payroll, and cash management services; credit cards; fraud detection tools; and mobile deposit, remote deposit capture, automated clearing house, wire transfer, and image lockbox services. Further, the company provides wealth management and trust services comprising customized investment portfolio management, financial planning, trust administration, estate settlement, and custody services, as well as 401(k) plan services; and automated teller machines, and telephone and digital banking services. It operates through 12 branch offices in Marin, southern Sonoma counties, and north of San Francisco, California; and a loan production office in San Francisco.
BMRC (Bank of Marin Bancorp) trades in the Financial Services sector, specifically Banks - Regional, with a market capitalization of approximately $414.3M, a trailing P/E of 8.66, a beta of 0.81 versus the broader market, a 52-week range of 20.25-28.48, average daily share volume of 106K, a public-listing history dating back to 1999, approximately 291 full-time employees. These structural characteristics shape how BMRC stock options price implied volatility around earnings windows, capital events, and macro-driven sector rotations.
A beta of 0.81 places BMRC roughly in line with broader market moves, so the strategy payoff and realized volatility track the index-equivalent baseline. The trailing P/E of 8.66 is on the value side, where IV often compresses outside event windows because forward growth expectations are already discounted into the share price. BMRC pays a dividend, which adjusts put-call parity and shifts the ex-dividend pricing across the listed chain.
What is a butterfly on BMRC?
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 BMRC snapshot
As of May 15, 2026, spot at $25.30, ATM IV 86.60%, IV rank 31.37%, expected move 24.83%. The butterfly on BMRC 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 BMRC specifically: BMRC IV at 86.60% is mid-range versus its 1-year history, so strategy selection should anchor more to the directional thesis than to the IV regime, with a market-implied 1-standard-deviation move of approximately 24.83% (roughly $6.28 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 BMRC expiries trade a higher absolute premium for lower per-day decay. Position sizing on BMRC should anchor to the underlying notional of $25.30 per share and to the trader's directional view on BMRC stock.
BMRC butterfly setup
The BMRC 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 BMRC near $25.30, the first option leg uses a $24.04 strike; additional legs (when the strategy has them) anchor to spot-relative offsets. Premiums come from the bid/ask midpoint on the listed BMRC 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 BMRC shares for the stock leg in covered calls and collars).
| Action | Type | Strike / Basis | Premium (est) |
|---|---|---|---|
| Buy 1 | Call | $24.04 | N/A |
| Sell 2 | Call | $25.30 | N/A |
| Buy 1 | Call | $26.57 | N/A |
BMRC 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.
BMRC butterfly payoff curve
Modeled P&L at expiration across a range of underlying prices for the butterfly on BMRC. 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 BMRC
Butterflies on BMRC are pinning bets - traders use them when they expect BMRC 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.
BMRC thesis for this butterfly
The market-implied 1-standard-deviation range for BMRC extends from approximately $19.02 on the downside to $31.58 on the upside. A BMRC long call butterfly is a pinning play: it pays maximum at the middle strike if BMRC settles there at expiration, with the wing legs capping both the cost and the maximum loss to the net debit. Current BMRC IV rank near 31.37% is mid-range against its 1-year distribution, so the IV signal is neutral; the butterfly thesis on BMRC should anchor more to the directional view and the expected-move geometry. As a Financial Services name, BMRC options can move on sector-level news flow (peer earnings, regulatory updates, industry-specific macro data) in addition to BMRC-specific events.
BMRC 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. BMRC positions also carry Financial Services sector concentration risk; news flow inside the sector (peer earnings, regulatory shifts, supply-chain headlines) can move BMRC alongside the broader basket even when BMRC-specific fundamentals are unchanged. Always rebuild the position from current BMRC chain quotes before placing a trade.
Frequently asked questions
- What is a butterfly on BMRC?
- A butterfly on BMRC is the butterfly strategy applied to BMRC (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 BMRC stock trading near $25.30, the strikes shown on this page are snapped to the nearest listed BMRC chain strike and the premiums come straight from the end-of-day bid/ask midpoint.
- How are BMRC 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 BMRC butterfly priced from the end-of-day chain at a 30-day expiry (ATM IV 86.60%), 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 BMRC butterfly?
- The breakeven for the BMRC 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 BMRC market-implied 1-standard-deviation expected move is approximately 24.83%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.
- When should you consider a butterfly on BMRC?
- Butterflies on BMRC are pinning bets - traders use them when they expect BMRC 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 BMRC implied volatility affect this butterfly?
- BMRC ATM IV is at 86.60% with IV rank near 31.37%, which is mid-range against its 1-year history. Strategy selection depends more on directional thesis and expected move than on a strong IV signal.