CytomX Therapeutics (CTMX) Options Chain
NASDAQ: CTMXHealth 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
- $2.57
- Put/call ratio (OI)
- 3.60
- Put/call ratio (volume)
- 0.48
- ATM implied volatility
- 160.0%
- Expected move
- ±$1.36
- Open interest (C / P)
- 1.37K / 4.93K
CTMX options summary
The CTMX options chain for the November 20, 2026 expiration lists 11 call and 5 put contracts, with 40 days until expiration. Open interest stands at 1,369 calls and 4,931 puts, a put/call ratio of 3.60, which is more bearish, with puts outnumbering calls. At-the-money implied volatility near the $3.00 strike is 160.0%, which implies the market expects a move of about ±$1.36 (53.0%) in CytomX Therapeutics stock by expiration.
The most open interest sits at the $5.00 call (468 contracts) and the $4.00 put (4.78K contracts).
Summary generated from market data by MetaCap's automated system. Methodology
CTMX options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 1.72 | 1.05 | 1.80 | 1.00 | — | — | — | |||||
| 0.90 | 0.40 | 1.05 | 2.00 | 0.20 | 0.25 | 0.15 | |||||
| 0.40 | 0.25 | 0.45 | 3.00 | 0.60 | 1.15 | 0.80 | |||||
| 0.15 | 0.10 | 0.15 | 4.00 | 1.30 | 2.00 | 1.45 | |||||
| 0.15 | 0.05 | 0.15 | 5.00 | 2.10 | 3.10 | 2.37 | |||||
| 0.01 | 0.00 | 0.75 | 6.00 | 1.55 | 2.55 | 2.40 | |||||
| 0.15 | 0.00 | 0.75 | 7.00 | — | — | — | |||||
| 0.10 | 0.00 | 0.35 | 8.00 | — | — | — | |||||
| 0.05 | 0.00 | 0.75 | 10.00 | — | — | — | |||||
| 0.11 | 0.00 | 0.75 | 12.00 | — | — | — | |||||
| 0.05 | 0.00 | 0.75 | 13.00 | — | — | — | |||||
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 CTMX put/call ratio?
For the November 20, 2026 expiration, the CTMX put/call ratio based on open interest is 3.60 (4,931 puts vs 1,369 calls), and 0.48 based on today's volume. A ratio above 1 means more puts than calls.
What is CTMX's implied volatility?
At-the-money implied volatility for CTMX options expiring November 20, 2026 is about 160.0%, an annualized estimate of how much the market expects CytomX Therapeutics stock to move.
How many CTMX option expiration dates are there?
CTMX has 6 listed expiration dates, from Oct 16, 2026 to Jan 21, 2028.
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.