CytomX Therapeutics (CTMX) Options Chain
NASDAQ: CTMXHealth CareBiotechnology: Pharmaceutical PreparationsUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Oct 16, 2026
- Days to expiration
- 6
- Share price
- $2.57
- Put/call ratio (OI)
- 0.31
- Put/call ratio (volume)
- 38.19
- ATM implied volatility
- 146.1%
- Expected move
- ±$0.4814
- Open interest (C / P)
- 787 / 242
CTMX options summary
The CTMX options chain for the October 16, 2026 expiration lists 4 call and 3 put contracts, with 6 days until expiration. Open interest stands at 787 calls and 242 puts, a put/call ratio of 0.31, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $3.00 strike is 146.1%, which implies the market expects a move of about ±$0.4814 (18.7%) in CytomX Therapeutics stock by expiration.
The most open interest sits at the $3.00 call (550 contracts) and the $3.00 put (239 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
CTMX options chain · October 16, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 0.72 | 0.10 | 0.65 | 2.00 | 0.00 | 0.20 | 0.20 | |||||
| 0.05 | 0.00 | 0.10 | 3.00 | 0.05 | 1.00 | 0.15 | |||||
| 0.05 | 0.00 | 0.20 | 4.00 | 1.10 | 2.05 | 1.20 | |||||
| 0.12 | 0.00 | 0.40 | 5.00 | — | — | — | |||||
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 October 16, 2026 expiration, the CTMX put/call ratio based on open interest is 0.31 (242 puts vs 787 calls), and 38.19 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 October 16, 2026 is about 146.1%, 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.