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: Jan 19, 2029
Days to expiration: 831
Share price: $1.93
Put/call ratio (OI): 0.54
Put/call ratio (volume): 2.59
ATM implied volatility: 123.8%
Expected move: ±$3.61
Open interest (C / P): 1.39K / 745

CABA options summary

The CABA options chain for the January 19, 2029 expiration lists 11 call and 9 put contracts, with 831 days until expiration. Open interest stands at 1,390 calls and 745 puts, a put/call ratio of 0.54, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $2.00 strike is 123.8%, which implies the market expects a move of about ±$3.61 (186.8%) in Cabaletta Bio stock by expiration.

The most open interest sits at the $5.50 call (802 contracts) and the $4.00 put (190 contracts).

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

CABA options chain · January 19, 2029

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
23	60	159.4%	1.70	1.30	2.15	0.50	—	—	—	—	—	—
71	60	143.0%	1.69	1.05	2.05	1.00	—	—	—	—	—	—
28	—	133.6%	2.08	0.90	1.90	1.50	0.35	1.35	0.90	115.2%	7	8
CABA $1.93
31	20	131.6%	1.50	0.80	1.80	2.00	0.75	1.75	1.40	116.0%	6	8
15	4	122.1%	1.46	0.65	1.65	2.50	1.20	2.20	1.70	119.7%	4	6
86	5	135.2%	1.30	0.70	1.70	3.00	1.50	2.50	1.70	106.3%	101	101
119	20	141.0%	1.10	0.70	1.70	3.50	2.15	3.10	2.45	125.2%	64	119
2	2	129.5%	1.62	0.55	1.55	4.00	2.40	3.40	2.90	108.2%	80	190
12	10	128.7%	1.13	0.50	1.50	4.50	2.90	3.80	3.39	108.0%	84	145
201	30	132.4%	0.60	0.50	1.50	5.00	3.20	4.20	3.75	98.7%	100	107
802	1	95.1%	0.83	0.05	1.05	5.50	3.70	4.70	4.17	102.2%	104	61

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 January 19, 2029 expiration, the CABA put/call ratio based on open interest is 0.54 (745 puts vs 1,390 calls), and 2.59 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 January 19, 2029 is about 123.8%, 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.