ACADIA Pharmaceuticals (ACAD) Options Chain
NASDAQ: ACADHealth CareBiotechnology: Pharmaceutical PreparationsUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Nov 20, 2026
- Days to expiration
- 40
- Share price
- $19.78
- Put/call ratio (OI)
- 3.71
- Put/call ratio (volume)
- 0.25
- Expected move
- ±$3.38
- Open interest (C / P)
- 3.43K / 12.70K
ACAD options summary
The ACAD options chain for the November 20, 2026 expiration lists 16 call and 11 put contracts, with 40 days until expiration. Open interest stands at 3,428 calls and 12,704 puts, a put/call ratio of 3.71, which is more bearish, with puts outnumbering calls. At-the-money implied volatility near the $20.00 strike is 51.7%, which implies the market expects a move of about ±$3.38 (17.1%) in ACADIA Pharmaceuticals stock by expiration.
The most open interest sits at the $22.00 call (1.02K contracts) and the $26.00 put (4.33K contracts).
Summary generated from market data by MetaCap's automated system. Methodology
ACAD options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 3.70 | 1.15 | 3.80 | 17.00 | 0.00 | 0.50 | 0.31 | |||||
| — | — | — | 18.00 | 0.30 | 0.55 | 0.50 | |||||
| — | — | — | 19.00 | 0.40 | 0.85 | 0.75 | |||||
| 1.25 | 0.90 | 1.30 | 20.00 | 1.05 | 1.45 | 1.24 | |||||
| 0.60 | 0.40 | 0.95 | 21.00 | 1.45 | 2.55 | 1.90 | |||||
| 0.55 | 0.40 | 0.60 | 22.00 | 1.80 | 3.70 | 2.45 | |||||
| 0.35 | 0.20 | 0.45 | 23.00 | 3.20 | 4.10 | 3.40 | |||||
| 0.20 | 0.00 | 0.70 | 24.00 | 3.40 | 5.60 | 3.00 | |||||
| 0.30 | 0.00 | 2.30 | 25.00 | 3.20 | 7.20 | 3.15 | |||||
| 4.70 | 0.00 | 2.25 | 26.00 | 4.20 | 7.80 | 6.47 | |||||
| 0.20 | 0.00 | 2.20 | 27.00 | 5.20 | 9.20 | 7.20 | |||||
| 3.75 | 0.00 | 1.35 | 29.00 | — | — | — | |||||
| 0.70 | 0.00 | 1.15 | 30.00 | — | — | — | |||||
| 2.90 | 0.00 | 1.35 | 31.00 | — | — | — | |||||
| 2.80 | 0.00 | 1.35 | 32.00 | — | — | — | |||||
| 2.60 | 0.00 | 1.35 | 33.00 | — | — | — | |||||
| 2.25 | 0.00 | 1.35 | 34.00 | — | — | — | |||||
| 2.00 | 0.00 | 1.35 | 35.00 | — | — | — | |||||
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 November 20, 2026 expiration, the ACAD put/call ratio based on open interest is 3.71 (12,704 puts vs 3,428 calls), and 0.25 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 November 20, 2026 is about 51.7%, 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.