Cabaletta Bio (CABA) Options Chain

NASDAQ: CABAHealth CareBiotechnology: Biological Products (No Diagnostic Substances)USD

1.93-0.02 (-1.03%)

At close: Oct 9, 4:00 PM ET · Delayed 15 min

Expiration date

Expiration: Feb 19, 2027
Days to expiration: 131
Share price: $1.93
Put/call ratio (OI): 0.60
Put/call ratio (volume): 1.27
ATM implied volatility: 121.9%
Expected move: ±$1.41
Open interest (C / P): 1.74K / 1.04K

CABA options summary

The CABA options chain for the February 19, 2027 expiration lists 10 call and 8 put contracts, with 131 days until expiration. Open interest stands at 1,744 calls and 1,044 puts, a put/call ratio of 0.60, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $2.00 strike is 121.9%, which implies the market expects a move of about ±$1.41 (73.0%) in Cabaletta Bio stock by expiration.

The most open interest sits at the $3.50 call (593 contracts) and the $2.50 put (327 contracts).

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

CABA options chain · February 19, 2027

CABA 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
114	1	201.6%	1.52	1.00	2.00	0.50	—	—	—	—	—	—
1	—	75.0%	1.60	0.45	1.45	1.00	—	—	—	—	—	—
89	97	105.9%	0.70	0.45	0.90	1.50	—	—	—	—	—	—
CABA $1.93
107	30	132.8%	0.76	0.15	1.00	2.00	0.05	1.05	0.55	110.9%	6	35
133	150	92.6%	0.35	0.00	0.50	2.50	0.35	1.35	0.84	99.2%	151	327
163	4	168.4%	0.10	0.00	1.00	3.00	0.80	1.80	1.29	109.4%	5	107
593	2	185.2%	0.25	0.00	1.00	3.50	1.20	1.90	1.66	148.1%	2	123
318	4	110.9%	0.18	0.00	0.25	4.00	2.05	2.60	2.18	144.1%	59	135
—	—	—	—	—	—	4.50	2.20	3.20	2.24	122.7%	100	174
110	2	197.7%	0.05	0.05	0.75	5.00	2.70	3.70	2.73	131.6%	94	118
116	100	171.5%	0.75	0.00	0.50	5.50	3.20	4.20	3.18	139.1%	80	25

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 February 19, 2027 expiration, the CABA put/call ratio based on open interest is 0.60 (1,044 puts vs 1,744 calls), and 1.27 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 February 19, 2027 is about 121.9%, 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.