STRL Butterfly Strategy
STRL (Sterling Infrastructure, Inc.), in the Industrials sector, (Engineering & Construction industry), listed on NASDAQ.
Sterling Infrastructure, Inc. engages in the transportation, e-infrastructure, and building solutions primarily in the Southern United States, the Northeastern and Mid-Atlantic United States, the Rocky Mountain states, California, and Hawaii. It undertakes infrastructure and rehabilitation projects for highways, roads, bridges, airports, ports, light rail, water, wastewater, and storm drainage systems for the departments of transportation in various states, regional transit authorities, airport authorities, port authorities, water authorities and railroads. The company also provides specialty site infrastructure improvement contracting services for blue-chip end users in the e-commerce, data center, distribution center and warehousing, and energy sectors. In addition, it undertakes residential and commercial concrete foundations for single-family and multi-family homes, parking structures, elevated slabs, and other concrete work for national home builders, regional and custom home builders, and developers and general contractors in commercial markets. The company was formerly known as Sterling Construction Company, Inc. and changed its name to Sterling Infrastructure, Inc. in June 2022. Sterling Infrastructure, Inc. was founded in 1955 and is headquartered in The Woodlands, Texas.
STRL (Sterling Infrastructure, Inc.) trades in the Industrials sector, specifically Engineering & Construction, with a market capitalization of approximately $26.21B, a trailing P/E of 75.54, a beta of 1.64 versus the broader market, a 52-week range of 176.15-888.95, average daily share volume of 558K, a public-listing history dating back to 1991, approximately 3K 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 1.64 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 75.54 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 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.
Current STRL snapshot
As of May 15, 2026, spot at $853.71, ATM IV 74.70%, IV rank 64.12%, expected move 21.42%. The butterfly on STRL 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 STRL specifically: STRL IV at 74.70% 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 21.42% (roughly $182.83 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 STRL expiries trade a higher absolute premium for lower per-day decay. Position sizing on STRL should anchor to the underlying notional of $853.71 per share and to the trader's directional view on STRL stock.
STRL butterfly setup
The STRL 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 STRL near $853.71, the first option leg uses a $810.00 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 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 STRL shares for the stock leg in covered calls and collars).
| Action | Type | Strike / Basis | Premium (est) |
|---|---|---|---|
| Buy 1 | Call | $810.00 | $99.00 |
| Sell 2 | Call | $850.00 | $79.80 |
| Buy 1 | Call | $900.00 | $56.55 |
STRL butterfly risk and reward
- Net Premium / Debit
- +$405.00
- Max Profit (per contract)
- $4,347.50
- Max Loss (per contract)
- -$595.00
- Breakeven(s)
- $894.25
- Risk / Reward Ratio
- 7.307
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.
| Underlying Price | % From Spot | P&L at Expiration |
|---|---|---|
| $0.01 | -100.0% | +$405.00 |
| $188.77 | -77.9% | +$405.00 |
| $377.53 | -55.8% | +$405.00 |
| $566.29 | -33.7% | +$405.00 |
| $755.05 | -11.6% | +$405.00 |
| $943.80 | +10.6% | -$595.00 |
| $1,132.56 | +32.7% | -$595.00 |
| $1,321.32 | +54.8% | -$595.00 |
| $1,510.08 | +76.9% | -$595.00 |
| $1,698.84 | +99.0% | -$595.00 |
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 $670.88 on the downside to $1,036.54 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 64.12% 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 trading near $853.71, the strikes shown on this page are snapped to the nearest listed STRL chain strike and the premiums come straight from the end-of-day 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 end-of-day chain at a 30-day expiry (ATM IV 74.70%), the computed maximum profit is $4,347.50 per contract and the computed maximum loss is -$595.00 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 $894.25 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 STRL market-implied 1-standard-deviation expected move is approximately 21.42%; 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 74.70% with IV rank near 64.12%, 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.