How are PEN 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 PEN butterfly priced from the end-of-day chain at a 30-day expiry (ATM IV 46.10%), the computed maximum profit is -$21.33 per contract and the computed maximum loss is -$1,910.00 per contract. Live intraday quotes will differ as the chain moves through the trading session.

What is the breakeven for a PEN butterfly?

The breakeven for the PEN 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 PEN market-implied 1-standard-deviation expected move is approximately 13.22%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.

How does current PEN implied volatility affect this butterfly?

PEN ATM IV is at 46.10% with IV rank near 9.07%, 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.

PEN Butterfly Strategy

PEN (Penumbra, Inc.), in the Healthcare sector, (Medical - Devices industry), listed on NYSE.

Penumbra, Inc. designs, develops, manufactures, and markets medical devices in the United States and internationally. The company offers aspiration based thrombectomy systems and accessory devices, including revascularization device for mechanical thrombectomy, such as Penumbra System under the Penumbra RED, JET, ACE, 3D Revascularization Device, and Penumbra ENGINE brands, as well as components and accessories; neurovascular embolization coiling systems to treat patients with various sizes of aneurysms and other neurovascular lesions under the Penumbra Coil 400, POD400, PAC400, and Penumbra SMART Coil brand names; and neurovascular access systems designed to provide intracranial access for use in a range of neurovascular therapies under the Neuron, Neuron MAX, Select, BENCHMARK, BMX96, DDC, and PX SLIM brands. It also provides neurosurgical aspiration tools for the removal of tissue and fluids under the Artemis Neuro Evacuation Device brand; aspiration-based thrombectomy systems for vascular applications under the Indigo System brand; and detachable embolic coil systems for peripheral embolization under the Ruby Coil and Ruby LP brand names. In addition, the company offers microcatheter for the delivery of detachable coils and occlusion devices under the LANTERN brand; and detachable, microcatheter-deliverable occlusion devices designed primarily to occlude peripheral vessels under the POD (Penumbra Occlusion Device) brand, as well as immersive computer-based technologies and immersive therapeutics to promote health, motor function, and cognition under the Real Immersive System brand; and a complementary device for use with Ruby Coil and POD for vessel occlusion under the Packing Coil and Packing Coil LP brands. The company sells its products through direct sales organizations and distributors. Penumbra, Inc. was incorporated in 2004 and is headquartered in Alameda, California.

PEN (Penumbra, Inc.) trades in the Healthcare sector, specifically Medical - Devices, with a market capitalization of approximately $12.69B, a trailing P/E of 74.07, a beta of 0.74 versus the broader market, a 52-week range of 221.26-362.41, average daily share volume of 578K, a public-listing history dating back to 2015, approximately 5K full-time employees. These structural characteristics shape how PEN stock options price implied volatility around earnings windows, capital events, and macro-driven sector rotations.

A beta of 0.74 places PEN roughly in line with broader market moves, so the strategy payoff and realized volatility track the index-equivalent baseline. The trailing P/E of 74.07 is on the rich side, which tends to correlate with higher earnings-window IV expansion as the market debates whether forward growth supports the multiple.

What is a butterfly on PEN?

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 PEN snapshot

As of May 15, 2026, spot at $322.73, ATM IV 46.10%, IV rank 9.07%, expected move 13.22%. The butterfly on PEN 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 PEN specifically: PEN IV at 46.10% is on the cheap side of its 1-year range, which favors premium-buying structures like a PEN butterfly, with a market-implied 1-standard-deviation move of approximately 13.22% (roughly $42.65 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 PEN expiries trade a higher absolute premium for lower per-day decay. Position sizing on PEN should anchor to the underlying notional of $322.73 per share and to the trader's directional view on PEN stock.

PEN butterfly setup

The PEN 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 PEN near $322.73, the first option leg uses a $310.00 strike; additional legs (when the strategy has them) anchor to spot-relative offsets. Premiums come from the bid/ask midpoint on the listed PEN 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 PEN shares for the stock leg in covered calls and collars).

Action	Type	Strike / Basis	Premium (est)
Buy 1	Call	$310.00	$15.10
Sell 2	Call	$320.00	$8.00
Buy 1	Call	$340.00	$10.00

PEN butterfly risk and reward

Net Premium / Debit: -$910.00
Max Profit (per contract): -$21.33
Max Loss (per contract): -$1,910.00
Breakeven(s): None on modeled curve
Risk / Reward Ratio: -0.011

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.

PEN butterfly payoff curve

Modeled P&L at expiration across a range of underlying prices for the butterfly on PEN. 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%	-$910.00
$71.37	-77.9%	-$910.00
$142.72	-55.8%	-$910.00
$214.08	-33.7%	-$910.00
$285.44	-11.6%	-$910.00
$356.79	+10.6%	-$1,910.00
$428.15	+32.7%	-$1,910.00
$499.50	+54.8%	-$1,910.00
$570.86	+76.9%	-$1,910.00
$642.22	+99.0%	-$1,910.00

When traders use butterfly on PEN

Butterflies on PEN are pinning bets - traders use them when they expect PEN 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.

PEN thesis for this butterfly

The market-implied 1-standard-deviation range for PEN extends from approximately $280.08 on the downside to $365.38 on the upside. A PEN long call butterfly is a pinning play: it pays maximum at the middle strike if PEN settles there at expiration, with the wing legs capping both the cost and the maximum loss to the net debit. Current PEN IV rank near 9.07% 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 PEN at 46.10%. As a Healthcare name, PEN options can move on sector-level news flow (peer earnings, regulatory updates, industry-specific macro data) in addition to PEN-specific events.

PEN 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. PEN positions also carry Healthcare sector concentration risk; news flow inside the sector (peer earnings, regulatory shifts, supply-chain headlines) can move PEN alongside the broader basket even when PEN-specific fundamentals are unchanged. Always rebuild the position from current PEN chain quotes before placing a trade.

Frequently asked questions

What is a butterfly on PEN?: A butterfly on PEN is the butterfly strategy applied to PEN (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 PEN stock trading near $322.73, the strikes shown on this page are snapped to the nearest listed PEN chain strike and the premiums come straight from the end-of-day bid/ask midpoint.
How are PEN 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 PEN butterfly priced from the end-of-day chain at a 30-day expiry (ATM IV 46.10%), the computed maximum profit is -$21.33 per contract and the computed maximum loss is -$1,910.00 per contract. Live intraday quotes will differ as the chain moves through the trading session.
What is the breakeven for a PEN butterfly?: The breakeven for the PEN 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 PEN market-implied 1-standard-deviation expected move is approximately 13.22%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.
When should you consider a butterfly on PEN?: Butterflies on PEN are pinning bets - traders use them when they expect PEN 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 PEN implied volatility affect this butterfly?: PEN ATM IV is at 46.10% with IV rank near 9.07%, 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.