How are SBLK 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 SBLK butterfly priced from the August 14, 2026 end-of-day chain at a 30-day expiry (ATM IV 28.20%), the computed maximum profit is $50.42 per contract and the computed maximum loss is -$37.50 per contract. Live intraday quotes will differ as the chain moves through the trading session.

What is the breakeven for a SBLK butterfly?

The breakeven for the SBLK butterfly priced on this page is roughly $28.38 and $29.63 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 SBLK market-implied 1-standard-deviation expected move in the same options snapshot is approximately 8.08%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.

How does current SBLK implied volatility affect this butterfly?

SBLK ATM IV is at 28.20% with IV rank near 24.49%, 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.

SBLK Butterfly Strategy

SBLK (Star Bulk Carriers Corp.), in the Industrials sector, (Marine Shipping industry), listed on NASDAQ.

Star Bulk Carriers Corp., a shipping company, engages in the ocean transportation of dry bulk cargoes through the ownership and operation of dry bulk carrier vessels worldwide. Its vessels transport a range of bulk commodities, including iron ores, minerals and grains, bauxite, fertilizers, and steel products. As of December 31, 2025, the company owned a fleet of 136 dry bulk vessels consisting of Newcastlemax, Capesize, Post Panamax, Kamsarmax, Panamax, Ultramax, and Supramax vessels with carrying capacities between 55,569 deadweight tonnage and 209,537 deadweight tonnage. Star Bulk Carriers Corp. was incorporated in 2006 and is based in Marousi, Greece.

SBLK (Star Bulk Carriers Corp.) trades in the Industrials sector, specifically Marine Shipping, with a market capitalization of approximately $3.24B, a trailing P/E of 11.26, a beta of 0.71 versus the broader market, a 52-week range of 16.72-29.5, average daily share volume of 1.2M, a public-listing history dating back to 2007, approximately 294 full-time employees. These structural characteristics shape how SBLK stock options price implied volatility around earnings windows, capital events, and macro-driven sector rotations.

A beta of 0.71 places SBLK roughly in line with broader market moves, so the strategy payoff and realized volatility track the index-equivalent baseline. The trailing P/E of 11.26 is on the value side, where IV often compresses outside event windows because forward growth expectations are already discounted into the share price. SBLK pays a dividend, which adjusts put-call parity and shifts the ex-dividend pricing across the listed chain.

What is a butterfly on SBLK?

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.

SBLK snapshot

As of August 14, 2026, spot at $29.02, ATM IV 28.20%, IV rank 24.49%, expected move 8.08%. The butterfly on SBLK 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 7-day expiry.

Why this butterfly structure on SBLK specifically: SBLK IV at 28.20% is on the cheap side of its 1-year range, which favors premium-buying structures like a SBLK butterfly, with a market-implied 1-standard-deviation move of approximately 8.08% (roughly $2.35 on the underlying). The 7-day window matched to the front-month expiry keeps theta exposure bounded while still capturing the post-snapshot move; longer-dated SBLK expiries trade a higher absolute premium for lower per-day decay. Position sizing on SBLK should anchor to the underlying notional of $29.02 per share and to the trader's directional view on SBLK stock.

SBLK butterfly setup

The SBLK 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 SBLK at $29.02 on that close, the first option leg uses a $28.00 strike; additional legs (when the strategy has them) anchor to spot-relative offsets. Premiums come from the bid/ask midpoint on the listed SBLK chain at a 7-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 SBLK shares for the stock leg in covered calls and collars).

Action	Type	Strike / Basis	Premium (est)
Buy 1	Call	$28.00	$1.13
Sell 2	Call	$29.00	$0.43
Buy 1	Call	$30.00	$0.10

SBLK butterfly risk and reward

Net Premium / Debit: -$37.50
Max Profit (per contract): $50.42
Max Loss (per contract): -$37.50
Breakeven(s): $28.38, $29.63
Risk / Reward Ratio: 1.345

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.

SBLK butterfly payoff curve

Modeled P&L at expiration across a range of underlying prices for the butterfly on SBLK. 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%	-$37.50
$6.43	-77.9%	-$37.50
$12.84	-55.8%	-$37.50
$19.26	-33.6%	-$37.50
$25.67	-11.5%	-$37.50
$32.09	+10.6%	-$37.50
$38.50	+32.7%	-$37.50
$44.92	+54.8%	-$37.50
$51.33	+76.9%	-$37.50
$57.75	+99.0%	-$37.50

When traders use butterfly on SBLK

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

SBLK thesis for this butterfly

The market-implied 1-standard-deviation range for SBLK extends from approximately $26.67 on the downside to $31.37 on the upside. A SBLK long call butterfly is a pinning play: it pays maximum at the middle strike if SBLK settles there at expiration, with the wing legs capping both the cost and the maximum loss to the net debit. Current SBLK IV rank near 24.49% 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 SBLK at 28.20%. As a Industrials name, SBLK options can move on sector-level news flow (peer earnings, regulatory updates, industry-specific macro data) in addition to SBLK-specific events.

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

Frequently asked questions

What is a butterfly on SBLK?: A butterfly on SBLK is the butterfly strategy applied to SBLK (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 SBLK stock at $29.02 on the August 14, 2026 close, the strikes shown on this page are snapped to the nearest listed SBLK chain strike and the premiums come straight from that session's bid/ask midpoint.
How are SBLK 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 SBLK butterfly priced from the August 14, 2026 end-of-day chain at a 30-day expiry (ATM IV 28.20%), the computed maximum profit is $50.42 per contract and the computed maximum loss is -$37.50 per contract. Live intraday quotes will differ as the chain moves through the trading session.
What is the breakeven for a SBLK butterfly?: The breakeven for the SBLK butterfly priced on this page is roughly $28.38 and $29.63 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 SBLK market-implied 1-standard-deviation expected move in the same options snapshot is approximately 8.08%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.
When should you consider a butterfly on SBLK?: Butterflies on SBLK are pinning bets - traders use them when they expect SBLK 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 SBLK implied volatility affect this butterfly?: SBLK ATM IV is at 28.20% with IV rank near 24.49%, 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.