IRON Butterfly Strategy
IRON (Disc Medicine, Inc.), in the Healthcare sector, (Biotechnology industry), listed on NASDAQ.
Disc Medicine, Inc., a clinical-stage biotechnology company, engages in discovery, development, and commercialization of novel treatments for patients suffering from serious hematologic diseases. It builds a portfolio of therapeutic candidates that address a spectrum of hematologic diseases by targeting fundamental biological pathways of red blood cell biology, primarily heme biosynthesis and iron homeostasis. The company is based in Watertown, Massachusetts.
IRON (Disc Medicine, Inc.) trades in the Healthcare sector, specifically Biotechnology, with a market capitalization of approximately $2.68B, a beta of 2.14 versus the broader market, a 52-week range of 40-99.5, average daily share volume of 587K, a public-listing history dating back to 2020, approximately 94 full-time employees. These structural characteristics shape how IRON stock options price implied volatility around earnings windows, capital events, and macro-driven sector rotations.
A beta of 2.14 indicates IRON 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 IRON?
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 IRON snapshot
As of May 15, 2026, spot at $66.80, ATM IV 60.10%, IV rank 11.59%, expected move 17.23%. The butterfly on IRON 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 IRON specifically: IRON IV at 60.10% is on the cheap side of its 1-year range, which favors premium-buying structures like a IRON butterfly, with a market-implied 1-standard-deviation move of approximately 17.23% (roughly $11.51 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 IRON expiries trade a higher absolute premium for lower per-day decay. Position sizing on IRON should anchor to the underlying notional of $66.80 per share and to the trader's directional view on IRON stock.
IRON butterfly setup
The IRON 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 IRON near $66.80, the first option leg uses a $65.00 strike; additional legs (when the strategy has them) anchor to spot-relative offsets. Premiums come from the bid/ask midpoint on the listed IRON 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 IRON shares for the stock leg in covered calls and collars).
| Action | Type | Strike / Basis | Premium (est) |
|---|---|---|---|
| Buy 1 | Call | $65.00 | $6.15 |
| Sell 2 | Call | $65.00 | $6.15 |
| Buy 1 | Call | $70.00 | $3.78 |
IRON butterfly risk and reward
- Net Premium / Debit
- +$237.50
- Max Profit (per contract)
- $237.50
- Max Loss (per contract)
- -$262.50
- Breakeven(s)
- $67.38
- Risk / Reward Ratio
- 0.905
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.
IRON butterfly payoff curve
Modeled P&L at expiration across a range of underlying prices for the butterfly on IRON. 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.
| Underlying Price | % From Spot | P&L at Expiration |
|---|---|---|
| $0.01 | -100.0% | +$237.50 |
| $14.78 | -77.9% | +$237.50 |
| $29.55 | -55.8% | +$237.50 |
| $44.32 | -33.7% | +$237.50 |
| $59.08 | -11.5% | +$237.50 |
| $73.85 | +10.6% | -$262.50 |
| $88.62 | +32.7% | -$262.50 |
| $103.39 | +54.8% | -$262.50 |
| $118.16 | +76.9% | -$262.50 |
| $132.93 | +99.0% | -$262.50 |
When traders use butterfly on IRON
Butterflies on IRON are pinning bets - traders use them when they expect IRON 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.
IRON thesis for this butterfly
The market-implied 1-standard-deviation range for IRON extends from approximately $55.29 on the downside to $78.31 on the upside. A IRON long call butterfly is a pinning play: it pays maximum at the middle strike if IRON settles there at expiration, with the wing legs capping both the cost and the maximum loss to the net debit. Current IRON IV rank near 11.59% 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 IRON at 60.10%. As a Healthcare name, IRON options can move on sector-level news flow (peer earnings, regulatory updates, industry-specific macro data) in addition to IRON-specific events.
IRON 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. IRON positions also carry Healthcare sector concentration risk; news flow inside the sector (peer earnings, regulatory shifts, supply-chain headlines) can move IRON alongside the broader basket even when IRON-specific fundamentals are unchanged. Always rebuild the position from current IRON chain quotes before placing a trade.
Frequently asked questions
- What is a butterfly on IRON?
- A butterfly on IRON is the butterfly strategy applied to IRON (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 IRON stock trading near $66.80, the strikes shown on this page are snapped to the nearest listed IRON chain strike and the premiums come straight from the end-of-day bid/ask midpoint.
- How are IRON 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 IRON butterfly priced from the end-of-day chain at a 30-day expiry (ATM IV 60.10%), the computed maximum profit is $237.50 per contract and the computed maximum loss is -$262.50 per contract. Live intraday quotes will differ as the chain moves through the trading session.
- What is the breakeven for a IRON butterfly?
- The breakeven for the IRON butterfly priced on this page is roughly $67.38 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 IRON market-implied 1-standard-deviation expected move is approximately 17.23%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.
- When should you consider a butterfly on IRON?
- Butterflies on IRON are pinning bets - traders use them when they expect IRON 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 IRON implied volatility affect this butterfly?
- IRON ATM IV is at 60.10% with IV rank near 11.59%, 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.