GSK (GSK) Options Chain

NYSE: GSKHealth CareBiotechnology: Pharmaceutical PreparationsUSD

46.50-0.04 (-0.09%)

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

Expiration date

Expiration: May 21, 2027
Days to expiration: 223
Share price: $46.50
Put/call ratio (OI): 1.70
Put/call ratio (volume): 0.83
ATM implied volatility: 27.7%
Expected move: ±$10.08
Open interest (C / P): 176 / 299

GSK options summary

The GSK options chain for the May 21, 2027 expiration lists 7 call and 7 put contracts, with 223 days until expiration. Open interest stands at 176 calls and 299 puts, a put/call ratio of 1.70, which is more bearish, with puts outnumbering calls. At-the-money implied volatility near the $47.00 strike is 27.7%, which implies the market expects a move of about ±$10.08 (21.7%) in GSK stock by expiration.

The most open interest sits at the $50.00 call (45 contracts) and the $45.00 put (169 contracts).

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

GSK options chain · May 21, 2027

GSK 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
—	—	—	—	—	—	40.00	1.35	1.55	1.49	29.6%	6	105
—	—	—	—	—	—	41.00	1.60	1.80	1.60	29.1%	20	20
—	—	—	—	—	—	43.00	2.20	2.45	2.10	28.4%	—	1
—	—	—	—	—	—	44.00	2.60	2.80	1.95	27.8%	—	2
3	1	28.1%	5.13	4.50	4.80	45.00	3.00	3.20	3.20	27.4%	1	169
GSK $46.50
18	16	27.7%	3.80	3.50	3.80	47.00	—	—	—	—	—	—
8	3	27.0%	2.90	2.70	2.90	49.00	5.10	5.40	4.80	27.1%	1	1
45	1	27.0%	2.53	2.35	2.55	50.00	—	—	—	—	—	—
42	10	27.0%	1.40	1.10	1.30	55.00	9.20	9.90	7.69	27.9%	1	1
27	3	29.7%	0.65	0.50	0.85	60.00	—	—	—	—	—	—
33	1	29.3%	0.35	0.20	0.40	65.00	—	—	—	—	—	—

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 GSK put/call ratio?

For the May 21, 2027 expiration, the GSK put/call ratio based on open interest is 1.70 (299 puts vs 176 calls), and 0.83 based on today's volume. A ratio above 1 means more puts than calls.

What is GSK's implied volatility?

At-the-money implied volatility for GSK options expiring May 21, 2027 is about 27.7%, an annualized estimate of how much the market expects GSK stock to move.

How many GSK option expiration dates are there?

GSK has 10 listed expiration dates, from Oct 16, 2026 to Jan 19, 2029.

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.