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: Jan 21, 2028
Days to expiration: 468
Share price: $46.50
Put/call ratio (OI): 0.58
Put/call ratio (volume): 0.81
ATM implied volatility: 31.1%
Expected move: ±$16.40
Open interest (C / P): 6.73K / 3.88K

GSK options summary

The GSK options chain for the January 21, 2028 expiration lists 20 call and 19 put contracts, with 468 days until expiration. Open interest stands at 6,731 calls and 3,884 puts, a put/call ratio of 0.58, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $47.00 strike is 31.1%, which implies the market expects a move of about ±$16.40 (35.3%) in GSK stock by expiration.

The most open interest sits at the $65.00 call (1.56K contracts) and the $40.00 put (1.45K contracts).

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

GSK options chain · January 21, 2028

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
5	7	44.5%	28.90	23.30	24.10	23.00	0.10	0.40	0.18	40.5%	4	11
0	1	—	26.17	0.00	0.00	25.00	0.20	0.45	0.33	37.4%	20	17
14	1	36.7%	22.40	18.50	19.30	28.00	0.35	0.65	0.45	34.7%	3	26
145	16	35.0%	20.15	16.60	17.50	30.00	0.50	0.80	0.67	32.8%	3	79
0	30	—	17.20	0.00	0.00	33.00	0.85	1.05	1.00	29.7%	10	39
237	2	32.0%	16.72	12.60	13.30	35.00	1.20	1.50	1.34	29.7%	4	184
73	2	31.1%	10.90	10.30	11.10	38.00	1.80	2.15	1.69	28.3%	5	47
97	2	30.3%	9.30	9.00	9.70	40.00	2.40	2.70	2.15	27.4%	50	1,445
257	1	29.5%	8.15	7.70	8.40	42.00	3.00	3.40	2.70	26.9%	5	37
215	35	28.2%	6.20	6.20	6.60	45.00	4.20	4.60	4.50	25.8%	3	1,123
GSK $46.50
335	9	27.8%	5.40	5.30	5.60	47.00	5.10	7.50	5.44	34.5%	30	55
1,344	2	27.6%	4.52	4.00	4.40	50.00	6.80	7.40	5.64	25.2%	5	451
958	1	26.9%	2.45	2.50	2.80	55.00	10.10	10.60	10.40	23.2%	2	82
301	2	27.2%	1.60	1.50	1.85	60.00	14.10	14.80	12.99	23.8%	1	191
1,556	1	28.0%	1.20	0.95	1.30	65.00	18.50	19.30	19.00	24.2%	2	35
177	8	28.6%	0.80	0.60	0.90	70.00	18.60	19.30	18.04	—	10	57
699	21	29.3%	0.70	0.40	0.65	75.00	23.00	23.90	22.40	—	4	5
39	5	30.9%	0.50	0.25	0.55	80.00	33.00	36.00	29.43	46.7%	2	0
185	50	32.0%	0.50	0.15	0.45	85.00	—	—	—	—	—	—
94	5	33.5%	0.45	0.10	0.40	90.00	0.00	0.00	34.81	—	—	0

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 January 21, 2028 expiration, the GSK put/call ratio based on open interest is 0.58 (3,884 puts vs 6,731 calls), and 0.81 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 January 21, 2028 is about 31.1%, 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.