Cabaletta Bio (CABA) Options Chain
NASDAQ: CABAHealth CareBiotechnology: Biological Products (No Diagnostic Substances)USD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- May 21, 2027
- Days to expiration
- 223
- Share price
- $1.93
- Put/call ratio (OI)
- 3.73
- Put/call ratio (volume)
- 7.75
- ATM implied volatility
- 122.5%
- Expected move
- ±$1.85
- Open interest (C / P)
- 80 / 298
CABA options summary
The CABA options chain for the May 21, 2027 expiration lists 9 call and 7 put contracts, with 223 days until expiration. Open interest stands at 80 calls and 298 puts, a put/call ratio of 3.73, which is more bearish, with puts outnumbering calls. At-the-money implied volatility near the $2.00 strike is 122.5%, which implies the market expects a move of about ±$1.85 (95.7%) in Cabaletta Bio stock by expiration.
The most open interest sits at the $2.50 call (43 contracts) and the $4.50 put (99 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
CABA options chain · May 21, 2027
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 1.45 | — | — | 0.50 | — | — | — | |||||
| 1.20 | 0.95 | 1.45 | 1.00 | — | — | — | |||||
| 0.85 | — | — | 1.50 | — | — | — | |||||
| 0.70 | 0.20 | 1.20 | 2.00 | 0.25 | 1.25 | 0.60 | |||||
| 0.55 | 0.15 | 1.15 | 2.50 | 0.95 | 1.55 | 1.14 | |||||
| 0.40 | — | — | 3.00 | 1.45 | 1.95 | 1.50 | |||||
| 0.50 | 0.05 | 1.05 | 3.50 | 1.60 | 2.25 | 1.93 | |||||
| — | — | — | 4.00 | 1.90 | 2.65 | 2.39 | |||||
| 0.18 | — | — | 4.50 | 2.30 | 3.30 | 2.58 | |||||
| 0.28 | 0.00 | 1.00 | 5.00 | 2.70 | 3.70 | 3.02 | |||||
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 CABA put/call ratio?
For the May 21, 2027 expiration, the CABA put/call ratio based on open interest is 3.73 (298 puts vs 80 calls), and 7.75 based on today's volume. A ratio above 1 means more puts than calls.
What is CABA's implied volatility?
At-the-money implied volatility for CABA options expiring May 21, 2027 is about 122.5%, an annualized estimate of how much the market expects Cabaletta Bio stock to move.
How many CABA option expiration dates are there?
CABA has 7 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.