How are STRL 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 STRL butterfly priced from the August 14, 2026 end-of-day chain at a 30-day expiry (ATM IV 69.20%), the computed maximum profit is $2,231.55 per contract and the computed maximum loss is -$580.00 per contract. Live intraday quotes will differ as the chain moves through the trading session.

What is the breakeven for a STRL butterfly?

The breakeven for the STRL butterfly priced on this page is roughly $555.80 at expiration, derived from the August 14, 2026 end-of-day chain's premiums. Breakeven is the underlying price at which the strategy's P&L crosses zero ignoring transaction costs and assignment risk. The STRL market-implied 1-standard-deviation expected move in the same options snapshot is approximately 19.84%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.

How does current STRL implied volatility affect this butterfly?

STRL ATM IV is at 69.20% with IV rank near 35.35%, 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.

STRL Butterfly Strategy

STRL (Sterling Infrastructure, Inc.), in the Industrials sector, (Engineering & Construction industry), listed on NASDAQ.

Sterling Infrastructure, Inc. operates across three distinct business segments: transportation, e-infrastructure, and building solutions. The company's operations span a significant portion of the United States, including the Southern, Northeastern, and Mid-Atlantic regions, as well as the Rocky Mountain states, California, and Hawaii. Within its transportation division, Sterling specializes in developing and rehabilitating critical infrastructure. This includes projects such as highways, roads, bridges, airports, ports, and light rail systems, alongside essential water, wastewater, and storm drainage solutions. Their clients in this sector range from state departments of transportation and regional transit authorities to airport, port, and water authorities, as well as railway companies. Furthermore, Sterling delivers specialized site infrastructure development services.

STRL (Sterling Infrastructure, Inc.) trades in the Industrials sector, specifically Engineering & Construction, with a market capitalization of approximately $17.69B, a trailing P/E of 40.98, a beta of 1.89 versus the broader market, a 52-week range of 263.45-1005.68, average daily share volume of 745K, a public-listing history dating back to 1991, approximately 4K full-time employees. These structural characteristics shape how STRL stock options price implied volatility around earnings windows, capital events, and macro-driven sector rotations.

A beta of 1.89 indicates STRL 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 40.98 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. STRL pays a dividend, which adjusts put-call parity and shifts the ex-dividend pricing across the listed chain.

What is a butterfly on STRL?

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.

STRL snapshot

As of August 14, 2026, spot at $575.22, ATM IV 69.20%, IV rank 35.35%, expected move 19.84%. The butterfly on STRL below is built from the August 14, 2026 end-of-day chain, with strikes snapped to listed contracts and premiums pulled from the bid/ask midpoint at a 35-day expiry.

Why this butterfly structure on STRL specifically: STRL IV at 69.20% 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 19.84% (roughly $114.12 on the underlying). The 35-day window matched to the front-month expiry keeps theta exposure bounded while still capturing the post-snapshot move; longer-dated STRL expiries trade a higher absolute premium for lower per-day decay. Position sizing on STRL should anchor to the underlying notional of $575.22 per share and to the trader's directional view on STRL stock.

STRL butterfly setup

The STRL butterfly below is built from the August 14, 2026 end-of-day chain, with each option leg priced at the bid/ask midpoint of its listed strike. With STRL at $575.22 on that close, the first option leg uses a $550.00 strike; additional legs (when the strategy has them) anchor to spot-relative offsets. Premiums come from the bid/ask midpoint on the listed STRL chain at a 35-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 STRL shares for the stock leg in covered calls and collars).

Action	Type	Strike / Basis	Premium (est)
Buy 1	Call	$550.00	$61.65
Sell 2	Call	$580.00	$47.00
Buy 1	Call	$600.00	$38.15

STRL butterfly risk and reward

Net Premium / Debit: -$580.00
Max Profit (per contract): $2,231.55
Max Loss (per contract): -$580.00
Breakeven(s): $555.80
Risk / Reward Ratio: 3.848

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.

STRL butterfly payoff curve

Modeled P&L at expiration across a range of underlying prices for the butterfly on STRL. 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.

P&L at expiration across the modeled underlying-price range. Green shading marks profitable regions, red shading marks loss regions. Dotted purple verticals mark breakevens; the solid dark vertical marks current spot.

Underlying Price	% From Spot	P&L at Expiration
$0.01	-100.0%	-$580.00
$127.19	-77.9%	-$580.00
$254.38	-55.8%	-$580.00
$381.56	-33.7%	-$580.00
$508.74	-11.6%	-$580.00
$635.93	+10.6%	+$420.00
$763.11	+32.7%	+$420.00
$890.29	+54.8%	+$420.00
$1,017.48	+76.9%	+$420.00
$1,144.66	+99.0%	+$420.00

When traders use butterfly on STRL

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

STRL thesis for this butterfly

The market-implied 1-standard-deviation range for STRL extends from approximately $461.10 on the downside to $689.34 on the upside. A STRL long call butterfly is a pinning play: it pays maximum at the middle strike if STRL settles there at expiration, with the wing legs capping both the cost and the maximum loss to the net debit. Current STRL IV rank near 35.35% is mid-range against its 1-year distribution, so the IV signal is neutral; the butterfly thesis on STRL should anchor more to the directional view and the expected-move geometry. As a Industrials name, STRL options can move on sector-level news flow (peer earnings, regulatory updates, industry-specific macro data) in addition to STRL-specific events.

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

Frequently asked questions

What is a butterfly on STRL?: A butterfly on STRL is the butterfly strategy applied to STRL (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 STRL stock at $575.22 on the August 14, 2026 close, the strikes shown on this page are snapped to the nearest listed STRL chain strike and the premiums come straight from that session's bid/ask midpoint.
How are STRL 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 STRL butterfly priced from the August 14, 2026 end-of-day chain at a 30-day expiry (ATM IV 69.20%), the computed maximum profit is $2,231.55 per contract and the computed maximum loss is -$580.00 per contract. Live intraday quotes will differ as the chain moves through the trading session.
What is the breakeven for a STRL butterfly?: The breakeven for the STRL butterfly priced on this page is roughly $555.80 at expiration, derived from the August 14, 2026 end-of-day chain's premiums. Breakeven is the underlying price at which the strategy's P&L crosses zero ignoring transaction costs and assignment risk. The STRL market-implied 1-standard-deviation expected move in the same options snapshot is approximately 19.84%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.
When should you consider a butterfly on STRL?: Butterflies on STRL are pinning bets - traders use them when they expect STRL 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 STRL implied volatility affect this butterfly?: STRL ATM IV is at 69.20% with IV rank near 35.35%, 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.