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 21, 2028
Days to expiration: 468
Share price: $1.93
Put/call ratio (OI): 0.40
Put/call ratio (volume): 3.42
ATM implied volatility: 101.4%
Expected move: ±$2.22
Open interest (C / P): 3.88K / 1.54K

CABA options summary

The CABA options chain for the January 21, 2028 expiration lists 11 call and 10 put contracts, with 468 days until expiration. Open interest stands at 3,881 calls and 1,538 puts, a put/call ratio of 0.40, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $2.00 strike is 101.4%, which implies the market expects a move of about ±$2.22 (114.8%) in Cabaletta Bio stock by expiration.

The most open interest sits at the $3.00 call (831 contracts) and the $3.00 put (808 contracts).

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

CABA options chain · January 21, 2028

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
258	81	163.3%	1.54	1.40	1.85	0.50	0.00	1.00	0.39	—	2	12
36	1	126.6%	1.25	0.55	1.30	1.00	—	—	—	—	—	—
255	18	167.6%	1.14	0.95	1.75	1.50	0.00	1.00	0.85	94.1%	—	50
CABA $1.93
531	10	119.3%	0.95	0.45	1.45	2.00	0.25	1.25	1.05	83.4%	2	19
423	2	120.3%	0.85	0.35	1.35	2.50	0.75	1.75	0.90	99.2%	1	99
831	2	164.8%	0.75	0.60	1.60	3.00	1.60	2.30	1.78	135.0%	51	808
195	3	127.3%	0.80	0.25	1.25	3.50	1.65	2.50	2.21	98.8%	39	57
323	4	140.2%	0.75	0.30	1.30	4.00	2.10	3.10	2.62	108.8%	59	110
56	1	134.4%	0.05	0.20	1.20	4.50	2.50	3.50	2.93	103.3%	80	174
297	2	145.3%	0.55	0.25	1.25	5.00	3.00	4.00	3.33	108.4%	104	172
676	4	155.9%	0.45	0.35	1.25	5.50	3.50	4.50	3.77	112.9%	100	37

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 21, 2028 expiration, the CABA put/call ratio based on open interest is 0.40 (1,538 puts vs 3,881 calls), and 3.42 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 21, 2028 is about 101.4%, 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.