ACADIA Pharmaceuticals (ACAD) Options Chain

NASDAQ: ACADHealth CareBiotechnology: Pharmaceutical PreparationsUSD

19.61-0.045 (-0.23%)

Market open · Delayed 15 min · as of Oct 8, 3:58 PM ET

Expiration date

Expiration: Oct 16, 2026
Days to expiration: 8
Share price: $19.59
Put/call ratio (OI): 0.25
Put/call ratio (volume): 0.05
ATM implied volatility: 42.3%
Expected move: ±$1.23
Open interest (C / P): 38.09K / 9.67K

ACAD options summary

The ACAD options chain for the October 16, 2026 expiration lists 23 call and 14 put contracts, with 8 days until expiration. Open interest stands at 38,095 calls and 9,667 puts, a put/call ratio of 0.25, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $20.00 strike is 42.3%, which implies the market expects a move of about ±$1.23 (6.3%) in ACADIA Pharmaceuticals stock by expiration.

The most open interest sits at the $32.00 call (5.46K contracts) and the $21.00 put (3.50K contracts).

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

ACAD options chain · October 16, 2026

ACAD 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
61	61	214.1%	13.53	4.60	7.50	14.00	—	—	—	—	—	—
—	—	—	—	—	—	15.00	0.00	2.15	0.20	260.9%	—	1
—	—	—	—	—	—	18.00	0.00	0.15	0.20	56.3%	5	14
1	1	61.5%	1.38	0.05	2.10	19.00	0.15	0.20	0.15	35.7%	45	289
ACAD $19.59
23	1	42.8%	0.25	0.20	0.35	20.00	0.55	0.75	0.75	41.9%	5	1,266
4,006	16	81.0%	0.10	0.00	0.95	21.00	1.00	2.40	1.32	63.5%	109	3,495
3,049	40	85.7%	0.20	0.00	0.60	22.00	1.15	2.85	2.29	100.6%	2	131
2,762	2,759	115.8%	0.65	0.00	0.80	23.00	1.40	5.40	3.08	259.4%	2	3
12	12	582.1%	4.07	3.60	7.70	24.00	2.45	6.40	2.00	62.5%	2	16
2,297	2,367	180.7%	0.35	0.00	1.35	25.00	3.40	7.40	3.20	301.1%	1	5
23	16	160.9%	0.05	0.00	0.75	26.00	5.50	6.50	6.80	112.1%	3	2,424
3,964	3	110.2%	0.05	0.00	0.10	27.00	5.50	7.50	7.10	123.4%	77	1,980
5,351	263	172.3%	0.80	0.00	0.55	28.00	6.40	10.40	3.30	352.7%	10	0
2,071	25	117.2%	0.11	0.00	0.05	29.00	7.40	11.40	4.90	367.8%	12	8
1,403	1	125.0%	0.03	0.00	0.05	30.00	8.40	12.40	9.76	382.0%	5	35
242	15	237.1%	0.50	0.00	0.95	31.00	—	—	—	—	—	—
5,456	257	247.7%	0.75	0.00	0.95	32.00	—	—	—	—	—	—
3,515	4	242.6%	0.05	0.00	0.75	33.00	—	—	—	—	—	—
61	9	282.0%	1.30	0.00	1.15	34.00	—	—	—	—	—	—
1,982	10	291.8%	0.05	0.00	1.15	35.00	—	—	—	—	—	—
784	20	327.3%	1.30	0.00	1.55	36.00	—	—	—	—	—	—
651	2	323.6%	1.13	0.00	1.35	37.00	—	—	—	—	—	—
14	1	381.4%	0.70	0.00	2.15	38.00	—	—	—	—	—	—
106	27	192.2%	0.10	0.00	0.05	40.00	—	—	—	—	—	—
261	16	218.8%	0.03	0.00	0.05	45.00	—	—	—	—	—	—

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 ACAD put/call ratio?

For the October 16, 2026 expiration, the ACAD put/call ratio based on open interest is 0.25 (9,667 puts vs 38,095 calls), and 0.05 based on today's volume. A ratio above 1 means more puts than calls.

What is ACAD's implied volatility?

At-the-money implied volatility for ACAD options expiring October 16, 2026 is about 42.3%, an annualized estimate of how much the market expects ACADIA Pharmaceuticals stock to move.

How many ACAD option expiration dates are there?

ACAD has 5 listed expiration dates, from Oct 16, 2026 to Mar 19, 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.