FBRX Butterfly Strategy
FBRX (Forte Biosciences, Inc.), in the Healthcare sector, (Biotechnology industry), listed on NASDAQ.
Forte Biosciences, Inc. operates as a clinical-stage biopharmaceutical company in the United States. It is developing FB-102 program that addresses various autoimmune diseases, such as vitiligo and alopecia areata. The company is headquartered in Dallas, Texas.
FBRX (Forte Biosciences, Inc.) trades in the Healthcare sector, specifically Biotechnology, with a market capitalization of approximately $342.4M, a beta of 3.00 versus the broader market, a 52-week range of 7-35.8, average daily share volume of 283K, a public-listing history dating back to 2017, approximately 14 full-time employees. These structural characteristics shape how FBRX stock options price implied volatility around earnings windows, capital events, and macro-driven sector rotations.
A beta of 3.00 indicates FBRX has historically moved more than the broader market, amplifying both the directional payoff and the realized volatility relative to an index-equivalent position.
What is a butterfly on FBRX?
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 FBRX snapshot
As of May 15, 2026, spot at $23.06, ATM IV 228.40%, IV rank 39.41%, expected move 65.48%. The butterfly on FBRX 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 FBRX specifically: FBRX IV at 228.40% 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 65.48% (roughly $15.10 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 FBRX expiries trade a higher absolute premium for lower per-day decay. Position sizing on FBRX should anchor to the underlying notional of $23.06 per share and to the trader's directional view on FBRX stock.
FBRX butterfly setup
The FBRX 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 FBRX near $23.06, the first option leg uses a $21.91 strike; additional legs (when the strategy has them) anchor to spot-relative offsets. Premiums come from the bid/ask midpoint on the listed FBRX 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 FBRX shares for the stock leg in covered calls and collars).
| Action | Type | Strike / Basis | Premium (est) |
|---|---|---|---|
| Buy 1 | Call | $21.91 | N/A |
| Sell 2 | Call | $23.06 | N/A |
| Buy 1 | Call | $24.21 | N/A |
FBRX 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.
FBRX butterfly payoff curve
Modeled P&L at expiration across a range of underlying prices for the butterfly on FBRX. 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 FBRX
Butterflies on FBRX are pinning bets - traders use them when they expect FBRX 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.
FBRX thesis for this butterfly
The market-implied 1-standard-deviation range for FBRX extends from approximately $7.96 on the downside to $38.16 on the upside. A FBRX long call butterfly is a pinning play: it pays maximum at the middle strike if FBRX settles there at expiration, with the wing legs capping both the cost and the maximum loss to the net debit. Current FBRX IV rank near 39.41% is mid-range against its 1-year distribution, so the IV signal is neutral; the butterfly thesis on FBRX should anchor more to the directional view and the expected-move geometry. As a Healthcare name, FBRX options can move on sector-level news flow (peer earnings, regulatory updates, industry-specific macro data) in addition to FBRX-specific events.
FBRX 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. FBRX positions also carry Healthcare sector concentration risk; news flow inside the sector (peer earnings, regulatory shifts, supply-chain headlines) can move FBRX alongside the broader basket even when FBRX-specific fundamentals are unchanged. Always rebuild the position from current FBRX chain quotes before placing a trade.
Frequently asked questions
- What is a butterfly on FBRX?
- A butterfly on FBRX is the butterfly strategy applied to FBRX (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 FBRX stock trading near $23.06, the strikes shown on this page are snapped to the nearest listed FBRX chain strike and the premiums come straight from the end-of-day bid/ask midpoint.
- How are FBRX 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 FBRX butterfly priced from the end-of-day chain at a 30-day expiry (ATM IV 228.40%), 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 FBRX butterfly?
- The breakeven for the FBRX 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 FBRX market-implied 1-standard-deviation expected move is approximately 65.48%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.
- When should you consider a butterfly on FBRX?
- Butterflies on FBRX are pinning bets - traders use them when they expect FBRX 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 FBRX implied volatility affect this butterfly?
- FBRX ATM IV is at 228.40% with IV rank near 39.41%, 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.