Assembly Biosciences (ASMB) Options Chain

NASDAQ: ASMBHealth CareBiotechnology: Pharmaceutical PreparationsUSD

22.82-0.13 (-0.57%)

At close: Oct 8, 4:00 PM ET · Delayed 15 min

After hours: 22.82 0.00%

Expiration date

Expiration: Oct 16, 2026
Days to expiration: 8
Share price: $22.82
Put/call ratio (OI): 0.30
Put/call ratio (volume): 0.72
ATM implied volatility: 58.2%
Expected move: ±$1.97
Open interest (C / P): 356 / 108

ASMB options summary

The ASMB options chain for the October 16, 2026 expiration lists 6 call and 6 put contracts, with 8 days until expiration. Open interest stands at 356 calls and 108 puts, a put/call ratio of 0.30, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $22.50 strike is 58.2%, which implies the market expects a move of about ±$1.97 (8.6%) in Assembly Biosciences stock by expiration.

The most open interest sits at the $25.00 call (120 contracts) and the $25.00 put (67 contracts).

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

ASMB options chain · October 16, 2026

ASMB 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
0	4	69.7%	2.45	1.00	4.90	20.00	—	—	—	—	—	—
—	—	—	—	—	—	22.50	0.00	1.35	1.20	58.2%	31	37
ASMB $22.82
120	—	65.2%	1.90	0.00	0.50	25.00	2.10	2.70	2.30	62.3%	7	67
71	9	137.5%	0.05	0.05	0.50	30.00	5.50	9.50	7.50	143.6%	1	1
103	35	152.7%	0.30	0.00	0.20	35.00	10.50	14.40	3.70	187.5%	3	0
1	—	446.2%	0.25	0.00	4.90	40.00	15.50	19.50	7.30	237.1%	—	1
61	10	227.3%	0.15	0.00	0.25	45.00	20.50	24.30	9.50	251.9%	—	2

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 October 16, 2026 expiration, the ASMB put/call ratio based on open interest is 0.30 (108 puts vs 356 calls), and 0.72 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 October 16, 2026 is about 58.2%, 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.