How are WLK 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 WLK butterfly priced from the end-of-day chain at a 30-day expiry (ATM IV 50.80%), the computed maximum profit is $394.87 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 WLK butterfly?

The breakeven for the WLK butterfly priced on this page is roughly $85.72 and $94.28 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 WLK market-implied 1-standard-deviation expected move is approximately 14.56%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.

How does current WLK implied volatility affect this butterfly?

WLK ATM IV is at 50.80% with IV rank near 41.09%, 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.

WLK Butterfly Strategy

WLK (Westlake Corporation), in the Basic Materials sector, (Chemicals - Specialty industry), listed on NYSE.

Westlake Corporation manufactures and supplies petrochemicals, polymers, and building products worldwide. It operates through two segments, Performance and Essential Materials; and Housing and Infrastructure Products. The Performance and Essential Materials segment manufactures and markets polyethylene, styrene monomer, ethylene co-products, PVC, VCM, ethylene dichloride chlor-alkali, and chlorinated derivative products. The Housing and Infrastructure Products segment manufactures and sells residential PVC siding; PVC trim and moldings; roofing applications; decorative stone; windows; PVC decking; PVC films for various inflatables, wallcovering, tape, and roofing applications; polymer composite roof tiles; PVC pipe and fittings; PVC compounds; and various consumer and commercial products such as landscape edging; industrial, home and office matting; marine dock edging; and masonry joint controls. The company offers its products to a range of customers, including chemical processors, plastics fabricators, small construction contractors, municipalities, and supply warehouses for use in various consumer and industrial markets, including residential construction, flexible and rigid packaging, automotive products, healthcare products, water treatment, and coatings, as well as other durable and non-durable goods. The company was formerly known as Westlake Chemical Corporation and changed its name to Westlake Corporation in February 2022.

WLK (Westlake Corporation) trades in the Basic Materials sector, specifically Chemicals - Specialty, with a market capitalization of approximately $11.82B, a beta of 0.67 versus the broader market, a 52-week range of 56.33-124.23, average daily share volume of 1.3M, a public-listing history dating back to 2004, approximately 16K full-time employees. These structural characteristics shape how WLK stock options price implied volatility around earnings windows, capital events, and macro-driven sector rotations.

A beta of 0.67 indicates WLK has historically moved less than the broader market, dampening realized volatility and producing tighter expected-move bands per unit of dollar exposure. WLK pays a dividend, which adjusts put-call parity and shifts the ex-dividend pricing across the listed chain.

What is a butterfly on WLK?

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 WLK snapshot

As of May 15, 2026, spot at $88.98, ATM IV 50.80%, IV rank 41.09%, expected move 14.56%. The butterfly on WLK 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 WLK specifically: WLK IV at 50.80% 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 14.56% (roughly $12.96 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 WLK expiries trade a higher absolute premium for lower per-day decay. Position sizing on WLK should anchor to the underlying notional of $88.98 per share and to the trader's directional view on WLK stock.

WLK butterfly setup

The WLK 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 WLK near $88.98, the first option leg uses a $85.00 strike; additional legs (when the strategy has them) anchor to spot-relative offsets. Premiums come from the bid/ask midpoint on the listed WLK 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 WLK shares for the stock leg in covered calls and collars).

Action	Type	Strike / Basis	Premium (est)
Buy 1	Call	$85.00	$7.45
Sell 2	Call	$90.00	$4.85
Buy 1	Call	$95.00	$2.98

WLK butterfly risk and reward

Net Premium / Debit: -$72.50
Max Profit (per contract): $394.87
Max Loss (per contract): -$72.50
Breakeven(s): $85.72, $94.28
Risk / Reward Ratio: 5.446

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.

WLK butterfly payoff curve

Modeled P&L at expiration across a range of underlying prices for the butterfly on WLK. 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%	-$72.50
$19.68	-77.9%	-$72.50
$39.36	-55.8%	-$72.50
$59.03	-33.7%	-$72.50
$78.70	-11.6%	-$72.50
$98.37	+10.6%	-$72.50
$118.05	+32.7%	-$72.50
$137.72	+54.8%	-$72.50
$157.39	+76.9%	-$72.50
$177.07	+99.0%	-$72.50

When traders use butterfly on WLK

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

WLK thesis for this butterfly

The market-implied 1-standard-deviation range for WLK extends from approximately $76.02 on the downside to $101.94 on the upside. A WLK long call butterfly is a pinning play: it pays maximum at the middle strike if WLK settles there at expiration, with the wing legs capping both the cost and the maximum loss to the net debit. Current WLK IV rank near 41.09% is mid-range against its 1-year distribution, so the IV signal is neutral; the butterfly thesis on WLK should anchor more to the directional view and the expected-move geometry. As a Basic Materials name, WLK options can move on sector-level news flow (peer earnings, regulatory updates, industry-specific macro data) in addition to WLK-specific events.

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

Frequently asked questions

What is a butterfly on WLK?: A butterfly on WLK is the butterfly strategy applied to WLK (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 WLK stock trading near $88.98, the strikes shown on this page are snapped to the nearest listed WLK chain strike and the premiums come straight from the end-of-day bid/ask midpoint.
How are WLK 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 WLK butterfly priced from the end-of-day chain at a 30-day expiry (ATM IV 50.80%), the computed maximum profit is $394.87 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 WLK butterfly?: The breakeven for the WLK butterfly priced on this page is roughly $85.72 and $94.28 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 WLK market-implied 1-standard-deviation expected move is approximately 14.56%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.
When should you consider a butterfly on WLK?: Butterflies on WLK are pinning bets - traders use them when they expect WLK 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 WLK implied volatility affect this butterfly?: WLK ATM IV is at 50.80% with IV rank near 41.09%, 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.