Compass Therapeutics (CMPX) Options Chain
NASDAQ: CMPXHealth CareBiotechnology: Biological Products (No Diagnostic Substances)USD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Nov 20, 2026
- Days to expiration
- 41
- Share price
- $0.993
- Put/call ratio (OI)
- 0.05
- Put/call ratio (volume)
- 0.17
- ATM implied volatility
- 139.8%
- Expected move
- ±$0.4654
- Open interest (C / P)
- 35.67K / 1.85K
CMPX options summary
The CMPX options chain for the November 20, 2026 expiration lists 11 call and 6 put contracts, with 41 days until expiration. Open interest stands at 35,667 calls and 1,849 puts, a put/call ratio of 0.05, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $1.00 strike is 139.8%, which implies the market expects a move of about ±$0.4654 (46.9%) in Compass Therapeutics stock by expiration.
The most open interest sits at the $3.00 call (23.64K contracts) and the $1.00 put (1.28K contracts).
Summary generated from market data by MetaCap's automated system. Methodology
CMPX options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 0.44 | 0.25 | 0.80 | 0.50 | 0.00 | 0.05 | 0.03 | |||||
| 0.32 | 0.00 | 0.35 | 1.00 | 0.15 | 0.25 | 0.22 | |||||
| 0.20 | 0.05 | 0.30 | 1.50 | 0.25 | 0.85 | 0.60 | |||||
| 0.05 | 0.00 | 0.10 | 2.00 | 0.80 | 1.30 | 1.07 | |||||
| 0.04 | 0.00 | 0.05 | 3.00 | 1.70 | 2.35 | 1.76 | |||||
| 0.04 | 0.00 | 0.15 | 4.00 | — | — | — | |||||
| 0.05 | 0.00 | 0.70 | 5.00 | — | — | — | |||||
| 0.21 | 0.00 | 0.70 | 6.00 | 4.50 | 5.50 | 3.90 | |||||
| 0.05 | 0.00 | 0.45 | 7.00 | — | — | — | |||||
| 0.27 | 0.00 | 0.70 | 8.00 | — | — | — | |||||
| 0.20 | 0.00 | 0.95 | 11.00 | — | — | — | |||||
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 CMPX put/call ratio?
For the November 20, 2026 expiration, the CMPX put/call ratio based on open interest is 0.05 (1,849 puts vs 35,667 calls), and 0.17 based on today's volume. A ratio above 1 means more puts than calls.
What is CMPX's implied volatility?
At-the-money implied volatility for CMPX options expiring November 20, 2026 is about 139.8%, an annualized estimate of how much the market expects Compass Therapeutics stock to move.
How many CMPX option expiration dates are there?
CMPX has 8 listed expiration dates, from Oct 16, 2026 to Jan 19, 2029.
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.