How are GBX 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 GBX butterfly priced from the end-of-day chain at a 30-day expiry (ATM IV 35.70%), the computed maximum profit is $210.13 per contract and the computed maximum loss is -$17.50 per contract. Live intraday quotes will differ as the chain moves through the trading session.

What is the breakeven for a GBX butterfly?

The breakeven for the GBX butterfly priced on this page is roughly $45.12 and $49.89 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 GBX market-implied 1-standard-deviation expected move is approximately 10.23%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.

How does current GBX implied volatility affect this butterfly?

GBX ATM IV is at 35.70% with IV rank near 17.92%, 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.

GBX Butterfly Strategy

GBX (The Greenbrier Companies, Inc.), in the Industrials sector, (Railroads industry), listed on NYSE.

The Greenbrier Companies, Inc. designs, manufactures, and markets railroad freight car equipment in North America, Europe, and South America. It operates through three segments: Manufacturing; Wheels, Repair & Parts; and Leasing & Services. The Manufacturing segment offers conventional railcars, such as covered hopper cars, boxcars, center partition cars, and bulkhead flat cars; tank cars; double-stack intermodal railcars; auto-max and multi-max products for the transportation of light vehicles; pressurized tank cars, non-pressurized tank cars, flat cars, coil cars, gondolas, sliding wall cars, and automobile transporter cars; and marine vessels. The Wheels, Repair & Parts segment provides wheel services, including reconditioning of wheels and axles, new axle machining and finishing, and downsizing; operates a railcar repair, refurbishment, and maintenance network; and reconditions and manufactures railcar cushioning units, couplers, yokes, side frames, bolsters, and various other parts, as well as produces roofs, doors, and associated parts for boxcars. The Leasing & Services segment offers operating leases and 'per diem' leases for a fleet of approximately 8,800 railcars; and management services comprising railcar maintenance management, railcar accounting services, fleet management and logistics, administration, and railcar remarketing. This segment owns or provides management services to a fleet of approximately 444,000 railcars for railroads, shippers, carriers, institutional investors, and other leasing and transportation companies.

GBX (The Greenbrier Companies, Inc.) trades in the Industrials sector, specifically Railroads, with a market capitalization of approximately $1.54B, a trailing P/E of 10.53, a beta of 1.46 versus the broader market, a 52-week range of 38.23-59.19, average daily share volume of 412K, a public-listing history dating back to 1994, approximately 14K full-time employees. These structural characteristics shape how GBX stock options price implied volatility around earnings windows, capital events, and macro-driven sector rotations.

A beta of 1.46 indicates GBX has historically moved more than the broader market, amplifying both the directional payoff and the realized volatility relative to an index-equivalent position. The trailing P/E of 10.53 is on the value side, where IV often compresses outside event windows because forward growth expectations are already discounted into the share price. GBX pays a dividend, which adjusts put-call parity and shifts the ex-dividend pricing across the listed chain.

What is a butterfly on GBX?

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 GBX snapshot

As of May 15, 2026, spot at $47.51, ATM IV 35.70%, IV rank 17.92%, expected move 10.23%. The butterfly on GBX 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 GBX specifically: GBX IV at 35.70% is on the cheap side of its 1-year range, which favors premium-buying structures like a GBX butterfly, with a market-implied 1-standard-deviation move of approximately 10.23% (roughly $4.86 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 GBX expiries trade a higher absolute premium for lower per-day decay. Position sizing on GBX should anchor to the underlying notional of $47.51 per share and to the trader's directional view on GBX stock.

GBX butterfly setup

The GBX 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 GBX near $47.51, the first option leg uses a $45.00 strike; additional legs (when the strategy has them) anchor to spot-relative offsets. Premiums come from the bid/ask midpoint on the listed GBX 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 GBX shares for the stock leg in covered calls and collars).

Action	Type	Strike / Basis	Premium (est)
Buy 1	Call	$45.00	$3.78
Sell 2	Call	$47.50	$2.28
Buy 1	Call	$50.00	$0.95

GBX butterfly risk and reward

Net Premium / Debit: -$17.50
Max Profit (per contract): $210.13
Max Loss (per contract): -$17.50
Breakeven(s): $45.12, $49.89
Risk / Reward Ratio: 12.007

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.

GBX butterfly payoff curve

Modeled P&L at expiration across a range of underlying prices for the butterfly on GBX. 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%	-$17.50
$10.51	-77.9%	-$17.50
$21.02	-55.8%	-$17.50
$31.52	-33.7%	-$17.50
$42.02	-11.5%	-$17.50
$52.53	+10.6%	-$17.50
$63.03	+32.7%	-$17.50
$73.54	+54.8%	-$17.50
$84.04	+76.9%	-$17.50
$94.54	+99.0%	-$17.50

When traders use butterfly on GBX

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

GBX thesis for this butterfly

The market-implied 1-standard-deviation range for GBX extends from approximately $42.65 on the downside to $52.37 on the upside. A GBX long call butterfly is a pinning play: it pays maximum at the middle strike if GBX settles there at expiration, with the wing legs capping both the cost and the maximum loss to the net debit. Current GBX IV rank near 17.92% 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 GBX at 35.70%. As a Industrials name, GBX options can move on sector-level news flow (peer earnings, regulatory updates, industry-specific macro data) in addition to GBX-specific events.

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

Frequently asked questions

What is a butterfly on GBX?: A butterfly on GBX is the butterfly strategy applied to GBX (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 GBX stock trading near $47.51, the strikes shown on this page are snapped to the nearest listed GBX chain strike and the premiums come straight from the end-of-day bid/ask midpoint.
How are GBX 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 GBX butterfly priced from the end-of-day chain at a 30-day expiry (ATM IV 35.70%), the computed maximum profit is $210.13 per contract and the computed maximum loss is -$17.50 per contract. Live intraday quotes will differ as the chain moves through the trading session.
What is the breakeven for a GBX butterfly?: The breakeven for the GBX butterfly priced on this page is roughly $45.12 and $49.89 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 GBX market-implied 1-standard-deviation expected move is approximately 10.23%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.
When should you consider a butterfly on GBX?: Butterflies on GBX are pinning bets - traders use them when they expect GBX 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 GBX implied volatility affect this butterfly?: GBX ATM IV is at 35.70% with IV rank near 17.92%, 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.