ACADIA Pharmaceuticals (ACAD) Options Chain

NASDAQ: ACADHealth CareBiotechnology: Pharmaceutical PreparationsUSD

19.78+0.20 (+1.02%)

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

Expiration date

Expiration: Dec 18, 2026
Days to expiration: 68
Share price: $19.78
Put/call ratio (OI): 0.58
Put/call ratio (volume): 0.72
ATM implied volatility: 56.4%
Expected move: ±$4.81
Open interest (C / P): 3.80K / 2.19K

ACAD options summary

The ACAD options chain for the December 18, 2026 expiration lists 21 call and 18 put contracts, with 68 days until expiration. Open interest stands at 3,802 calls and 2,193 puts, a put/call ratio of 0.58, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $20.00 strike is 56.4%, which implies the market expects a move of about ±$4.81 (24.3%) in ACADIA Pharmaceuticals stock by expiration.

The most open interest sits at the $30.00 call (1.03K contracts) and the $22.00 put (1.01K contracts).

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

ACAD options chain · December 18, 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
6	3	62.7%	13.70	4.50	7.50	14.00	0.05	0.30	0.16	59.0%	34	365
11	5	59.3%	4.90	3.10	7.10	15.00	—	—	—	—	—	—
0	12	56.6%	12.93	2.30	6.20	16.00	0.00	1.40	0.28	66.9%	5	160
—	—	—	—	—	—	17.00	0.15	0.90	0.60	62.6%	71	172
—	—	—	—	—	—	18.00	0.50	0.85	0.63	48.4%	5	18
—	—	—	—	—	—	19.00	0.80	1.35	1.00	51.0%	1	4
ACAD $19.78
—	—	—	—	—	—	20.00	1.25	2.05	1.74	56.4%	2	3
—	—	—	—	—	—	21.00	1.35	2.95	2.00	64.9%	1	3
159	8	52.8%	1.25	0.45	1.00	22.00	2.30	3.50	1.95	61.4%	6	1,006
46	4	49.4%	0.45	0.35	0.65	23.00	1.55	4.90	2.15	82.0%	1	3
131	1	59.9%	0.56	0.05	0.75	24.00	2.60	6.40	4.39	104.9%	15	38
608	10	65.4%	0.45	0.00	1.45	25.00	4.10	7.30	3.40	55.9%	1	56
319	2	88.1%	3.79	0.00	2.40	26.00	5.00	8.30	3.90	59.3%	1	301
39	21	74.8%	0.45	0.00	1.35	27.00	5.20	9.20	4.70	119.1%	3	1
29	1	81.9%	1.65	0.00	1.45	28.00	6.30	10.20	4.00	125.0%	8	0
100	1	102.9%	5.00	0.05	2.25	29.00	0.00	0.00	4.30	—	8	0
1,034	10	106.8%	0.25	0.00	2.25	30.00	8.60	12.20	4.50	62.7%	5	57
166	10	93.5%	3.40	0.00	1.35	31.00	0.00	0.00	5.00	—	—	0
0	1	25.0%	3.50	0.00	0.00	32.00	—	—	—	—	—	—
3	5	96.8%	0.20	0.00	1.15	33.00	—	—	—	—	—	—
0	1	25.0%	2.73	0.00	0.00	34.00	—	—	—	—	—	—
149	100	117.6%	1.10	0.00	1.75	35.00	6.90	11.10	8.30	—	—	6
1	—	114.5%	1.75	0.00	1.45	36.00	—	—	—	—	—	—
1,001	1	110.5%	2.00	0.00	1.15	37.00	—	—	—	—	—	—
0	36	50.0%	1.85	0.00	0.00	40.00	—	—	—	—	—	—
0	1	50.0%	1.40	0.00	0.00	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 December 18, 2026 expiration, the ACAD put/call ratio based on open interest is 0.58 (2,193 puts vs 3,802 calls), and 0.72 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 December 18, 2026 is about 56.4%, 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.