AC Immune SA (ACIU) Options Chain
NASDAQ: ACIUHealth 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
- $2.50
- Put/call ratio (OI)
- 0.31
- Put/call ratio (volume)
- 0.48
- ATM implied volatility
- 124.6%
- Expected move
- ±$1.03
- Open interest (C / P)
- 1.90K / 581
ACIU options summary
The ACIU options chain for the November 20, 2026 expiration lists 3 call and 2 put contracts, with 40 days until expiration. Open interest stands at 1,897 calls and 581 puts, a put/call ratio of 0.31, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $2.50 strike is 124.6%, which implies the market expects a move of about ±$1.03 (41.3%) in AC Immune SA stock by expiration.
The most open interest sits at the $5.00 call (1.31K contracts) and the $2.50 put (561 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
ACIU options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 0.35 | 0.00 | 0.50 | 2.50 | 0.15 | 1.00 | 0.60 | |||||
| 0.04 | 0.00 | 0.05 | 5.00 | 0.55 | 3.40 | 2.57 | |||||
| 0.20 | 0.00 | 0.00 | 7.50 | — | — | — | |||||
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 ACIU put/call ratio?
For the November 20, 2026 expiration, the ACIU put/call ratio based on open interest is 0.31 (581 puts vs 1,897 calls), and 0.48 based on today's volume. A ratio above 1 means more puts than calls.
What is ACIU's implied volatility?
At-the-money implied volatility for ACIU options expiring November 20, 2026 is about 124.6%, an annualized estimate of how much the market expects AC Immune SA stock to move.
How many ACIU option expiration dates are there?
ACIU has 4 listed expiration dates, from Oct 16, 2026 to May 21, 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.