How are MGK 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 MGK butterfly priced from the August 14, 2026 end-of-day chain at a 30-day expiry (ATM IV 15.60%), the computed maximum profit is $221.45 per contract and the computed maximum loss is -$267.50 per contract. Live intraday quotes will differ as the chain moves through the trading session.

What is the breakeven for a MGK butterfly?

The breakeven for the MGK butterfly priced on this page is roughly $88.68 and $93.33 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 MGK market-implied 1-standard-deviation expected move in the same options snapshot is approximately 4.47%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.

How does current MGK implied volatility affect this butterfly?

MGK ATM IV is at 15.60% with IV rank near 7.94%, 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.

MGK Butterfly Strategy

MGK (Vanguard Morningstar Mega Cap Growth ETF), in the Financial Services sector, (Asset Management industry), listed on AMEX.

The Vanguard Mega Cap Growth ETF (MGK) aims to replicate the performance of the CRSP US Mega Cap Growth Index. It achieves this through a passively managed, full-replication strategy, meaning it invests in all constituents of the index. This provides investors with a straightforward and diversified avenue to gain exposure to the largest, growth-oriented companies within the U.S. market. For 75% of its total assets, specific investment limitations are in place: the fund is generally prohibited from acquiring more than 10% of the outstanding voting shares of any single company. Additionally, it typically cannot invest more than 5% of its total assets in the securities of any one issuer, unless necessary to closely align the portfolio with the target index's composition. These limitations do not, however, extend to obligations issued by the U.S. government or its associated agencies and instrumentalities.

MGK (Vanguard Morningstar Mega Cap Growth ETF) trades in the Financial Services sector, specifically Asset Management, with a market capitalization of approximately $34.99B, a beta of 1.26 versus the broader market, a 52-week range of 63.74-92.38, average daily share volume of 1.6M, a public-listing history dating back to 2007. These structural characteristics shape how MGK etf options price implied volatility around earnings windows, capital events, and macro-driven sector rotations.

A beta of 1.26 places MGK roughly in line with broader market moves, so the strategy payoff and realized volatility track the index-equivalent baseline. MGK pays a dividend, which adjusts put-call parity and shifts the ex-dividend pricing across the listed chain.

What is a butterfly on MGK?

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.

MGK snapshot

As of August 14, 2026, spot at $90.65, ATM IV 15.60%, IV rank 7.94%, expected move 4.47%. The butterfly on MGK 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 MGK specifically: MGK IV at 15.60% is on the cheap side of its 1-year range, which favors premium-buying structures like a MGK butterfly, with a market-implied 1-standard-deviation move of approximately 4.47% (roughly $4.05 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 MGK expiries trade a higher absolute premium for lower per-day decay. Position sizing on MGK should anchor to the underlying notional of $90.65 per share and to the trader's directional view on MGK etf.

MGK butterfly setup

The MGK 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 MGK at $90.65 on that close, the first option leg uses a $86.00 strike; additional legs (when the strategy has them) anchor to spot-relative offsets. Premiums come from the bid/ask midpoint on the listed MGK 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 MGK shares for the stock leg in covered calls and collars).

Action	Type	Strike / Basis	Premium (est)
Buy 1	Call	$86.00	$5.70
Sell 2	Call	$91.00	$1.83
Buy 1	Call	$95.00	$0.63

MGK butterfly risk and reward

Net Premium / Debit: -$267.50
Max Profit (per contract): $221.45
Max Loss (per contract): -$267.50
Breakeven(s): $88.68, $93.33
Risk / Reward Ratio: 0.828

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.

MGK butterfly payoff curve

Modeled P&L at expiration across a range of underlying prices for the butterfly on MGK. 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%	-$267.50
$20.05	-77.9%	-$267.50
$40.09	-55.8%	-$267.50
$60.14	-33.7%	-$267.50
$80.18	-11.6%	-$267.50
$100.22	+10.6%	-$167.50
$120.26	+32.7%	-$167.50
$140.30	+54.8%	-$167.50
$160.35	+76.9%	-$167.50
$180.39	+99.0%	-$167.50

When traders use butterfly on MGK

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

MGK thesis for this butterfly

The market-implied 1-standard-deviation range for MGK extends from approximately $86.60 on the downside to $94.70 on the upside. A MGK long call butterfly is a pinning play: it pays maximum at the middle strike if MGK settles there at expiration, with the wing legs capping both the cost and the maximum loss to the net debit. Current MGK IV rank near 7.94% 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 MGK at 15.60%. As a Financial Services name, MGK options can move on sector-level news flow (peer earnings, regulatory updates, industry-specific macro data) in addition to MGK-specific events.

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

Frequently asked questions

What is a butterfly on MGK?: A butterfly on MGK is the butterfly strategy applied to MGK (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 MGK etf at $90.65 on the August 14, 2026 close, the strikes shown on this page are snapped to the nearest listed MGK chain strike and the premiums come straight from that session's bid/ask midpoint.
How are MGK 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 MGK butterfly priced from the August 14, 2026 end-of-day chain at a 30-day expiry (ATM IV 15.60%), the computed maximum profit is $221.45 per contract and the computed maximum loss is -$267.50 per contract. Live intraday quotes will differ as the chain moves through the trading session.
What is the breakeven for a MGK butterfly?: The breakeven for the MGK butterfly priced on this page is roughly $88.68 and $93.33 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 MGK market-implied 1-standard-deviation expected move in the same options snapshot is approximately 4.47%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.
When should you consider a butterfly on MGK?: Butterflies on MGK are pinning bets - traders use them when they expect MGK 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 MGK implied volatility affect this butterfly?: MGK ATM IV is at 15.60% with IV rank near 7.94%, 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.