Assembly Biosciences (ASMB) Options Chain
NASDAQ: ASMBHealth CareBiotechnology: Pharmaceutical PreparationsUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Dec 18, 2026
- Days to expiration
- 68
- Share price
- $23.53
- Put/call ratio (OI)
- 0.18
- Put/call ratio (volume)
- 0.32
- Expected move
- ±$7.92
- Open interest (C / P)
- 751 / 132
ASMB options summary
The ASMB options chain for the December 18, 2026 expiration lists 11 call and 9 put contracts, with 68 days until expiration. Open interest stands at 751 calls and 132 puts, a put/call ratio of 0.18, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $22.50 strike is 78.0%, which implies the market expects a move of about ±$7.92 (33.7%) in Assembly Biosciences stock by expiration.
The most open interest sits at the $40.00 call (200 contracts) and the $17.50 put (52 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
ASMB options chain · December 18, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 10.80 | 8.70 | 13.40 | 12.50 | 0.00 | 4.90 | 0.75 | |||||
| 8.80 | 7.90 | 11.00 | 15.00 | 0.00 | 4.90 | 1.05 | |||||
| 10.11 | 0.00 | 0.00 | 17.50 | 0.00 | 4.90 | 0.50 | |||||
| 5.20 | 3.70 | 7.00 | 20.00 | 0.00 | 0.00 | 0.90 | |||||
| 4.44 | 1.00 | 5.50 | 22.50 | 0.00 | 3.00 | 3.00 | |||||
| 4.50 | 0.40 | 4.90 | 25.00 | 1.80 | 6.00 | 4.00 | |||||
| 1.15 | 0.85 | 4.80 | 30.00 | 5.80 | 9.50 | 8.35 | |||||
| 0.90 | 0.00 | 4.90 | 35.00 | 9.80 | 13.30 | 7.00 | |||||
| 0.65 | 0.00 | 1.25 | 40.00 | 14.50 | 19.00 | 7.80 | |||||
| 0.50 | 0.20 | 1.15 | 45.00 | — | — | — | |||||
| 0.40 | 0.00 | 4.90 | 50.00 | — | — | — | |||||
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 ASMB put/call ratio?
For the December 18, 2026 expiration, the ASMB put/call ratio based on open interest is 0.18 (132 puts vs 751 calls), and 0.32 based on today's volume. A ratio above 1 means more puts than calls.
What is ASMB's implied volatility?
At-the-money implied volatility for ASMB options expiring December 18, 2026 is about 78.0%, an annualized estimate of how much the market expects Assembly Biosciences stock to move.
How many ASMB option expiration dates are there?
ASMB has 4 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.