Acumen Pharmaceuticals (ABOS) Options Chain
NASDAQ: ABOSHealth CareBiotechnology: Biological Products (No Diagnostic Substances)USD
At close: Oct 8, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Oct 16, 2026
- Days to expiration
- 8
- Share price
- $2.10
- Put/call ratio (OI)
- 0.02
- Put/call ratio (volume)
- 0.02
- ATM implied volatility
- 121.9%
- Expected move
- ±$0.3789
- Open interest (C / P)
- 1.66K / 41
ABOS options summary
The ABOS options chain for the October 16, 2026 expiration lists 3 call and 2 put contracts, with 8 days until expiration. Open interest stands at 1,662 calls and 41 puts, a put/call ratio of 0.02, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $2.50 strike is 121.9%, which implies the market expects a move of about ±$0.3789 (18.0%) in Acumen Pharmaceuticals stock by expiration.
The most open interest sits at the $5.00 call (1.19K contracts) and the $2.50 put (41 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
ABOS options chain · October 16, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 0.25 | 0.00 | 0.05 | 2.50 | 0.00 | 0.90 | 0.55 | |||||
| 0.05 | 0.00 | 0.05 | 5.00 | 0.00 | 0.00 | 2.39 | |||||
| 0.05 | 0.00 | 1.30 | 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 ABOS put/call ratio?
For the October 16, 2026 expiration, the ABOS put/call ratio based on open interest is 0.02 (41 puts vs 1,662 calls), and 0.02 based on today's volume. A ratio above 1 means more puts than calls.
What is ABOS's implied volatility?
At-the-money implied volatility for ABOS options expiring October 16, 2026 is about 121.9%, an annualized estimate of how much the market expects Acumen Pharmaceuticals stock to move.
How many ABOS option expiration dates are there?
ABOS has 5 listed expiration dates, from Oct 16, 2026 to Apr 16, 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.