How are TAC 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 TAC butterfly priced from the end-of-day chain at a 30-day expiry (ATM IV 39.00%), the computed maximum profit is $27.50 per contract and the computed maximum loss is -$72.50 per contract. Live intraday quotes will differ as the chain moves through the trading session.

What is the breakeven for a TAC butterfly?

The breakeven for the TAC butterfly priced on this page is roughly $13.73 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 TAC market-implied 1-standard-deviation expected move is approximately 11.18%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.

How does current TAC implied volatility affect this butterfly?

TAC ATM IV is at 39.00% with IV rank near 4.30%, 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.

TAC Butterfly Strategy

TAC (TransAlta Corporation), in the Utilities sector, (Independent Power Producers industry), listed on NYSE.

TransAlta Corporation specializes in the ownership, operation, and expansion of a diverse array of electricity generation facilities, with a geographical presence spanning Canada, the United States, and Australia. The company's activities are organized into four key divisions: Hydro, Wind and Solar, Gas, and Energy Transition. Within its portfolio, TransAlta operates plants powered by hydroelectric, wind, solar, natural gas, and even coal. Beyond generating power, TransAlta is active in the wholesale trading of electricity, energy commodities, and financial derivatives. Its operations also encompass related mining ventures and the management of natural gas pipelines. The firm caters to a broad spectrum of clients, including municipalities, various industrial and commercial enterprises, and other utility providers.

TAC (TransAlta Corporation) trades in the Utilities sector, specifically Independent Power Producers, with a market capitalization of approximately $4.11B, a beta of 0.49 versus the broader market, a 52-week range of 10.28-17.88, average daily share volume of 1.5M, a public-listing history dating back to 2001, approximately 1K full-time employees. These structural characteristics shape how TAC stock options price implied volatility around earnings windows, capital events, and macro-driven sector rotations.

A beta of 0.49 indicates TAC has historically moved less than the broader market, dampening realized volatility and producing tighter expected-move bands per unit of dollar exposure. TAC pays a dividend, which adjusts put-call parity and shifts the ex-dividend pricing across the listed chain.

What is a butterfly on TAC?

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 TAC snapshot

As of June 29, 2026, spot at $13.65, ATM IV 39.00%, IV rank 4.30%, expected move 11.18%. The butterfly on TAC 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 53-day expiry.

Why this butterfly structure on TAC specifically: TAC IV at 39.00% is on the cheap side of its 1-year range, which favors premium-buying structures like a TAC butterfly, with a market-implied 1-standard-deviation move of approximately 11.18% (roughly $1.53 on the underlying). The 53-day window matched to the front-month expiry keeps theta exposure bounded while still capturing the post-snapshot move; longer-dated TAC expiries trade a higher absolute premium for lower per-day decay. Position sizing on TAC should anchor to the underlying notional of $13.65 per share and to the trader's directional view on TAC stock.

TAC butterfly setup

The TAC 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 TAC near $13.65, the first option leg uses a $13.00 strike; additional legs (when the strategy has them) anchor to spot-relative offsets. Premiums come from the bid/ask midpoint on the listed TAC chain at a 53-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 TAC shares for the stock leg in covered calls and collars).

Action	Type	Strike / Basis	Premium (est)
Buy 1	Call	$13.00	$1.58
Sell 2	Call	$14.00	$0.85
Buy 1	Call	$14.00	$0.85

TAC butterfly risk and reward

Net Premium / Debit: -$72.50
Max Profit (per contract): $27.50
Max Loss (per contract): -$72.50
Breakeven(s): $13.73
Risk / Reward Ratio: 0.379

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.

TAC butterfly payoff curve

Modeled P&L at expiration across a range of underlying prices for the butterfly on TAC. 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	-99.9%	-$72.50
$3.03	-77.8%	-$72.50
$6.04	-55.7%	-$72.50
$9.06	-33.6%	-$72.50
$12.08	-11.5%	-$72.50
$15.09	+10.6%	+$27.50
$18.11	+32.7%	+$27.50
$21.13	+54.8%	+$27.50
$24.15	+76.9%	+$27.50
$27.16	+99.0%	+$27.50

When traders use butterfly on TAC

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

TAC thesis for this butterfly

The market-implied 1-standard-deviation range for TAC extends from approximately $12.12 on the downside to $15.18 on the upside. A TAC long call butterfly is a pinning play: it pays maximum at the middle strike if TAC settles there at expiration, with the wing legs capping both the cost and the maximum loss to the net debit. Current TAC IV rank near 4.30% 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 TAC at 39.00%. As a Utilities name, TAC options can move on sector-level news flow (peer earnings, regulatory updates, industry-specific macro data) in addition to TAC-specific events.

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

Frequently asked questions

What is a butterfly on TAC?: A butterfly on TAC is the butterfly strategy applied to TAC (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 TAC stock trading near $13.65, the strikes shown on this page are snapped to the nearest listed TAC chain strike and the premiums come straight from the end-of-day bid/ask midpoint.
How are TAC 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 TAC butterfly priced from the end-of-day chain at a 30-day expiry (ATM IV 39.00%), the computed maximum profit is $27.50 per contract and the computed maximum loss is -$72.50 per contract. Live intraday quotes will differ as the chain moves through the trading session.
What is the breakeven for a TAC butterfly?: The breakeven for the TAC butterfly priced on this page is roughly $13.73 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 TAC market-implied 1-standard-deviation expected move is approximately 11.18%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.
When should you consider a butterfly on TAC?: Butterflies on TAC are pinning bets - traders use them when they expect TAC 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 TAC implied volatility affect this butterfly?: TAC ATM IV is at 39.00% with IV rank near 4.30%, 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.