ANAB Butterfly Strategy
ANAB (AnaptysBio, Inc.), in the Healthcare sector, (Biotechnology industry), listed on NASDAQ.
AnaptysBio, Inc., a clinical stage biotechnology company, engages in developing therapeutic product candidates for inflammation and immuno-oncology indications. Its products include Imsidolimab, an antibody that inhibits the interleukin-36 receptor (IL-36R) for the treatment of various dermatological inflammatory diseases; Rosnilimab, an anti-PD-1 agonist antibody program designed to augment PD-1 signaling through rosnilimab treatment to suppress T-cell driven human inflammatory diseases; and ANB032, an anti-BTLA modulator antibody applicable to human inflammatory diseases associated with lymphoid and myeloid immune cell dysregulation. The company also focuses on developing various antibody programs that are advanced to preclinical and clinical milestones under its collaborations. It has a collaboration and license agreement with GlaxoSmithKline, Inc. and Bristol-Myers Squibb; and license agreements with United Kingdom Research and Innovation, as well as Millipore Corporation. The company was formerly known as Anaptys Biosciences, Inc. and changed its name to AnaptysBio, Inc. in July 2006. AnaptysBio, Inc. was incorporated in 2005 and is based in San Diego, California.
ANAB (AnaptysBio, Inc.) trades in the Healthcare sector, specifically Biotechnology, with a market capitalization of approximately $2.70B, a beta of 0.48 versus the broader market, a 52-week range of 11.404-72.36, average daily share volume of 838K, a public-listing history dating back to 2017, approximately 136 full-time employees. These structural characteristics shape how ANAB stock options price implied volatility around earnings windows, capital events, and macro-driven sector rotations.
A beta of 0.48 indicates ANAB has historically moved less than the broader market, dampening realized volatility and producing tighter expected-move bands per unit of dollar exposure.
What is a butterfly on ANAB?
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 ANAB snapshot
As of May 15, 2026, spot at $63.21, ATM IV 77.80%, IV rank 22.37%, expected move 22.30%. The butterfly on ANAB 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 ANAB specifically: ANAB IV at 77.80% is on the cheap side of its 1-year range, which favors premium-buying structures like a ANAB butterfly, with a market-implied 1-standard-deviation move of approximately 22.30% (roughly $14.10 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 ANAB expiries trade a higher absolute premium for lower per-day decay. Position sizing on ANAB should anchor to the underlying notional of $63.21 per share and to the trader's directional view on ANAB stock.
ANAB butterfly setup
The ANAB 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 ANAB near $63.21, the first option leg uses a $60.05 strike; additional legs (when the strategy has them) anchor to spot-relative offsets. Premiums come from the bid/ask midpoint on the listed ANAB 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 ANAB shares for the stock leg in covered calls and collars).
| Action | Type | Strike / Basis | Premium (est) |
|---|---|---|---|
| Buy 1 | Call | $60.05 | N/A |
| Sell 2 | Call | $63.21 | N/A |
| Buy 1 | Call | $66.37 | N/A |
ANAB 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.
ANAB butterfly payoff curve
Modeled P&L at expiration across a range of underlying prices for the butterfly on ANAB. 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 ANAB
Butterflies on ANAB are pinning bets - traders use them when they expect ANAB 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.
ANAB thesis for this butterfly
The market-implied 1-standard-deviation range for ANAB extends from approximately $49.11 on the downside to $77.31 on the upside. A ANAB long call butterfly is a pinning play: it pays maximum at the middle strike if ANAB settles there at expiration, with the wing legs capping both the cost and the maximum loss to the net debit. Current ANAB IV rank near 22.37% 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 ANAB at 77.80%. As a Healthcare name, ANAB options can move on sector-level news flow (peer earnings, regulatory updates, industry-specific macro data) in addition to ANAB-specific events.
ANAB 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. ANAB positions also carry Healthcare sector concentration risk; news flow inside the sector (peer earnings, regulatory shifts, supply-chain headlines) can move ANAB alongside the broader basket even when ANAB-specific fundamentals are unchanged. Always rebuild the position from current ANAB chain quotes before placing a trade.
Frequently asked questions
- What is a butterfly on ANAB?
- A butterfly on ANAB is the butterfly strategy applied to ANAB (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 ANAB stock trading near $63.21, the strikes shown on this page are snapped to the nearest listed ANAB chain strike and the premiums come straight from the end-of-day bid/ask midpoint.
- How are ANAB 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 ANAB butterfly priced from the end-of-day chain at a 30-day expiry (ATM IV 77.80%), 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 ANAB butterfly?
- The breakeven for the ANAB 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 ANAB market-implied 1-standard-deviation expected move is approximately 22.30%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.
- When should you consider a butterfly on ANAB?
- Butterflies on ANAB are pinning bets - traders use them when they expect ANAB 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 ANAB implied volatility affect this butterfly?
- ANAB ATM IV is at 77.80% with IV rank near 22.37%, 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.