Westlake (WLK) Options Chain

NYSE: WLKIndustrialsMajor ChemicalsUSD

62.29-0.02 (-0.03%)

At close: Oct 9, 4:00 PM ET · Delayed 15 min

Expiration date

Expiration: Nov 20, 2026
Days to expiration: 40
Share price: $62.29
Put/call ratio (OI): 1.19
Put/call ratio (volume): 0.75
ATM implied volatility: 60.8%
Expected move: ±$12.54
Open interest (C / P): 21 / 25

WLK options summary

The WLK options chain for the November 20, 2026 expiration lists 4 call and 5 put contracts, with 40 days until expiration. Open interest stands at 21 calls and 25 puts, a put/call ratio of 1.19, which is fairly balanced between calls and puts. At-the-money implied volatility near the $60.00 strike is 60.8%, which implies the market expects a move of about ±$12.54 (20.1%) in Westlake stock by expiration.

The most open interest sits at the $75.00 call (14 contracts) and the $60.00 put (22 contracts).

Summary generated from market data by MetaCap's automated system. Methodology

WLK options chain · November 20, 2026

WLK calls and puts by strike price. Shaded cells are in the money.
Calls							Puts
OI	Vol	IV	Last	Bid	Ask	Strike	Bid	Ask	Last	IV	Vol	OI
—	—	—	—	—	—	50.00	—	—	0.65	—	—	—
—	—	—	—	—	—	55.00	—	—	1.45	—	—	—
—	—	—	—	—	—	60.00	0.50	3.90	2.00	60.8%	5	22
WLK $62.29
—	—	—	—	—	—	65.00	3.50	6.50	3.40	59.2%	1	2
—	—	—	1.33	—	—	70.00	—	—	—	—	—	—
14	6	54.4%	0.75	0.40	1.60	75.00	10.90	15.50	8.38	82.1%	—	1
7	2	61.7%	1.30	0.05	1.55	80.00	—	—	—	—	—	—
—	—	—	0.05	—	—	100.00	—	—	—	—	—	—

In-the-money callsIn-the-money puts. IV = implied volatility, OI = open interest (contracts). Each contract covers 100 shares. Quotes delayed at least 15 minutes.

Frequently asked questions

What is the WLK put/call ratio?

For the November 20, 2026 expiration, the WLK put/call ratio based on open interest is 1.19 (25 puts vs 21 calls), and 0.75 based on today's volume. A ratio above 1 means more puts than calls.

What is WLK's implied volatility?

At-the-money implied volatility for WLK options expiring November 20, 2026 is about 60.8%, an annualized estimate of how much the market expects Westlake stock to move.

How many WLK option expiration dates are there?

WLK has 6 listed expiration dates, from Oct 16, 2026 to Dec 17, 2027.

What does "in the money" mean?

A call is in the money when the strike price is below the current share price; a put is in the money when the strike is above it. In-the-money contracts have intrinsic value and are shaded in the table.