How are BWX 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 BWX butterfly priced from the end-of-day chain at a 30-day expiry (ATM IV 297.90%), the computed maximum profit is $65.46 per contract and the computed maximum loss is -$27.00 per contract. Live intraday quotes will differ as the chain moves through the trading session.

What is the breakeven for a BWX butterfly?

The breakeven for the BWX butterfly priced on this page is roughly $21.27 and $22.73 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 BWX market-implied 1-standard-deviation expected move is approximately 4.46%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.

How does current BWX implied volatility affect this butterfly?

BWX ATM IV is at 297.90% with IV rank near 59.26%, 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.

BWX Butterfly Strategy

BWX (SPDR Bloomberg International Treasury Bond ETF), in the Financial Services sector, (Asset Management - Bonds industry), listed on AMEX.

SPDR Bloomberg International Treasury Bond ETF seeks to provide investment results that, before fees and expenses, correspond generally to the price and yield performance of the Bloomberg Global Treasury ex-US Capped Index (the "Index")Seeks to provide exposure to fixed-rate local currency sovereign debt of investment grade countries outside the United StatesIndex includes government bonds issued by investment grade countries outside the United States, in local currencies, that have a remaining maturity of one year or more and are rated investment gradeRebalanced on the last business day of the month

BWX (SPDR Bloomberg International Treasury Bond ETF) trades in the Financial Services sector, specifically Asset Management - Bonds, with a market capitalization of approximately $1.27B, a beta of 1.39 versus the broader market, a 52-week range of 21.65-23.55, average daily share volume of 845K, a public-listing history dating back to 2007. These structural characteristics shape how BWX etf options price implied volatility around earnings windows, capital events, and macro-driven sector rotations.

A beta of 1.39 indicates BWX has historically moved more than the broader market, amplifying both the directional payoff and the realized volatility relative to an index-equivalent position. BWX pays a dividend, which adjusts put-call parity and shifts the ex-dividend pricing across the listed chain.

What is a butterfly on BWX?

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 BWX snapshot

As of May 15, 2026, spot at $21.81, ATM IV 297.90%, IV rank 59.26%, expected move 4.46%. The butterfly on BWX 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 BWX specifically: BWX IV at 297.90% 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 4.46% (roughly $0.97 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 BWX expiries trade a higher absolute premium for lower per-day decay. Position sizing on BWX should anchor to the underlying notional of $21.81 per share and to the trader's directional view on BWX etf.

BWX butterfly setup

The BWX 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 BWX near $21.81, the first option leg uses a $21.00 strike; additional legs (when the strategy has them) anchor to spot-relative offsets. Premiums come from the bid/ask midpoint on the listed BWX 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 BWX shares for the stock leg in covered calls and collars).

Action	Type	Strike / Basis	Premium (est)
Buy 1	Call	$21.00	$1.07
Sell 2	Call	$22.00	$0.48
Buy 1	Call	$23.00	$0.16

BWX butterfly risk and reward

Net Premium / Debit: -$27.00
Max Profit (per contract): $65.46
Max Loss (per contract): -$27.00
Breakeven(s): $21.27, $22.73
Risk / Reward Ratio: 2.424

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.

BWX butterfly payoff curve

Modeled P&L at expiration across a range of underlying prices for the butterfly on BWX. 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%	-$27.00
$4.83	-77.8%	-$27.00
$9.65	-55.7%	-$27.00
$14.47	-33.6%	-$27.00
$19.29	-11.5%	-$27.00
$24.12	+10.6%	-$27.00
$28.94	+32.7%	-$27.00
$33.76	+54.8%	-$27.00
$38.58	+76.9%	-$27.00
$43.40	+99.0%	-$27.00

When traders use butterfly on BWX

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

BWX thesis for this butterfly

The market-implied 1-standard-deviation range for BWX extends from approximately $20.84 on the downside to $22.78 on the upside. A BWX long call butterfly is a pinning play: it pays maximum at the middle strike if BWX settles there at expiration, with the wing legs capping both the cost and the maximum loss to the net debit. Current BWX IV rank near 59.26% is mid-range against its 1-year distribution, so the IV signal is neutral; the butterfly thesis on BWX should anchor more to the directional view and the expected-move geometry. As a Financial Services name, BWX options can move on sector-level news flow (peer earnings, regulatory updates, industry-specific macro data) in addition to BWX-specific events.

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

Frequently asked questions

What is a butterfly on BWX?: A butterfly on BWX is the butterfly strategy applied to BWX (etf). 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 BWX etf trading near $21.81, the strikes shown on this page are snapped to the nearest listed BWX chain strike and the premiums come straight from the end-of-day bid/ask midpoint.
How are BWX 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 BWX butterfly priced from the end-of-day chain at a 30-day expiry (ATM IV 297.90%), the computed maximum profit is $65.46 per contract and the computed maximum loss is -$27.00 per contract. Live intraday quotes will differ as the chain moves through the trading session.
What is the breakeven for a BWX butterfly?: The breakeven for the BWX butterfly priced on this page is roughly $21.27 and $22.73 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 BWX market-implied 1-standard-deviation expected move is approximately 4.46%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.
When should you consider a butterfly on BWX?: Butterflies on BWX are pinning bets - traders use them when they expect BWX 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 BWX implied volatility affect this butterfly?: BWX ATM IV is at 297.90% with IV rank near 59.26%, 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.