How are SPTL 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 SPTL butterfly priced from the end-of-day chain at a 30-day expiry (ATM IV 8.20%), the computed maximum profit is $56.86 per contract and the computed maximum loss is -$136.00 per contract. Live intraday quotes will differ as the chain moves through the trading session.

What is the breakeven for a SPTL butterfly?

The breakeven for the SPTL butterfly priced on this page is roughly $24.36 and $25.64 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 SPTL market-implied 1-standard-deviation expected move is approximately 2.35%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.

How does current SPTL implied volatility affect this butterfly?

SPTL ATM IV is at 8.20% with IV rank near 1.11%, 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.

SPTL Butterfly Strategy

SPTL (State Street SPDR Portfolio Long Term Treasury ETF), in the Financial Services sector, (Asset Management industry), listed on AMEX.

The State Street SPDR Portfolio Long Term Treasury ETF seeks to provide investment results that, before fees and expenses, correspond generally to the price and yield performance of the Bloomberg Long U.S. Treasury Index (the "Index")One of the low cost core State Street SPDR Portfolio ETFs, a suite of portfolio building blocks designed to provide broad, diversified exposure to core asset classesA low cost ETF that seeks to offer precise, comprehensive exposure to US Treasuries with remaining maturities of 10 or more yearsMay be more sensitive to interest rate fluctuations than vehicles with shorter duration, and is market cap weighted and reconstituted on the last business day of the month

SPTL (State Street SPDR Portfolio Long Term Treasury ETF) trades in the Financial Services sector, specifically Asset Management, with a market capitalization of approximately $10.39B, a beta of 2.23 versus the broader market, a 52-week range of 25.17-27.7, average daily share volume of 7.4M, a public-listing history dating back to 2007. These structural characteristics shape how SPTL etf options price implied volatility around earnings windows, capital events, and macro-driven sector rotations.

A beta of 2.23 indicates SPTL has historically moved more than the broader market, amplifying both the directional payoff and the realized volatility relative to an index-equivalent position. SPTL pays a dividend, which adjusts put-call parity and shifts the ex-dividend pricing across the listed chain.

What is a butterfly on SPTL?

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 SPTL snapshot

As of May 15, 2026, spot at $25.45, ATM IV 8.20%, IV rank 1.11%, expected move 2.35%. The butterfly on SPTL 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 SPTL specifically: SPTL IV at 8.20% is on the cheap side of its 1-year range, which favors premium-buying structures like a SPTL butterfly, with a market-implied 1-standard-deviation move of approximately 2.35% (roughly $0.60 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 SPTL expiries trade a higher absolute premium for lower per-day decay. Position sizing on SPTL should anchor to the underlying notional of $25.45 per share and to the trader's directional view on SPTL etf.

SPTL butterfly setup

The SPTL 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 SPTL near $25.45, the first option leg uses a $24.00 strike; additional legs (when the strategy has them) anchor to spot-relative offsets. Premiums come from the bid/ask midpoint on the listed SPTL 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 SPTL shares for the stock leg in covered calls and collars).

Action	Type	Strike / Basis	Premium (est)
Buy 1	Call	$24.00	$1.50
Sell 2	Call	$25.00	$0.58
Buy 1	Call	$27.00	$0.01

SPTL butterfly risk and reward

Net Premium / Debit: -$36.00
Max Profit (per contract): $56.86
Max Loss (per contract): -$136.00
Breakeven(s): $24.36, $25.64
Risk / Reward Ratio: 0.418

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.

SPTL butterfly payoff curve

Modeled P&L at expiration across a range of underlying prices for the butterfly on SPTL. 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%	-$36.00
$5.64	-77.9%	-$36.00
$11.26	-55.7%	-$36.00
$16.89	-33.6%	-$36.00
$22.51	-11.5%	-$36.00
$28.14	+10.6%	-$136.00
$33.77	+32.7%	-$136.00
$39.39	+54.8%	-$136.00
$45.02	+76.9%	-$136.00
$50.64	+99.0%	-$136.00

When traders use butterfly on SPTL

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

SPTL thesis for this butterfly

The market-implied 1-standard-deviation range for SPTL extends from approximately $24.85 on the downside to $26.05 on the upside. A SPTL long call butterfly is a pinning play: it pays maximum at the middle strike if SPTL settles there at expiration, with the wing legs capping both the cost and the maximum loss to the net debit. Current SPTL IV rank near 1.11% 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 SPTL at 8.20%. As a Financial Services name, SPTL options can move on sector-level news flow (peer earnings, regulatory updates, industry-specific macro data) in addition to SPTL-specific events.

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

Frequently asked questions

What is a butterfly on SPTL?: A butterfly on SPTL is the butterfly strategy applied to SPTL (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 SPTL etf trading near $25.45, the strikes shown on this page are snapped to the nearest listed SPTL chain strike and the premiums come straight from the end-of-day bid/ask midpoint.
How are SPTL 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 SPTL butterfly priced from the end-of-day chain at a 30-day expiry (ATM IV 8.20%), the computed maximum profit is $56.86 per contract and the computed maximum loss is -$136.00 per contract. Live intraday quotes will differ as the chain moves through the trading session.
What is the breakeven for a SPTL butterfly?: The breakeven for the SPTL butterfly priced on this page is roughly $24.36 and $25.64 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 SPTL market-implied 1-standard-deviation expected move is approximately 2.35%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.
When should you consider a butterfly on SPTL?: Butterflies on SPTL are pinning bets - traders use them when they expect SPTL 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 SPTL implied volatility affect this butterfly?: SPTL ATM IV is at 8.20% with IV rank near 1.11%, 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.