Krystal Biotech (KRYS) Options Chain

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

331.61+4.31 (+1.32%)

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

Expiration date

Expiration: May 21, 2027
Days to expiration: 223
Share price: $331.61
Put/call ratio (OI): 3.80
Put/call ratio (volume): 10.00
ATM implied volatility: 48.5%
Expected move: ±$125.79
Open interest (C / P): 5 / 19

KRYS options summary

The KRYS options chain for the May 21, 2027 expiration lists 3 call and 3 put contracts, with 223 days until expiration. Open interest stands at 5 calls and 19 puts, a put/call ratio of 3.80, which is more bearish, with puts outnumbering calls. At-the-money implied volatility near the $310.00 strike is 48.5%, which implies the market expects a move of about ±$125.79 (37.9%) in Krystal Biotech stock by expiration.

The most open interest sits at the $300.00 call (4 contracts) and the $300.00 put (13 contracts).

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

KRYS options chain · May 21, 2027

KRYS 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
—	—	—	88.50	—	—	260.00	—	—	—	—	—	—
—	—	—	—	—	—	290.00	26.50	29.90	25.20	49.7%	—	1
4	—	56.1%	85.00	70.50	73.80	300.00	30.50	33.90	35.22	49.0%	10	13
—	—	—	—	—	—	310.00	35.00	38.30	34.00	48.5%	—	5
KRYS $331.61
1	1	51.4%	38.05	28.50	32.10	400.00	—	—	—	—	—	—

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 KRYS put/call ratio?

For the May 21, 2027 expiration, the KRYS put/call ratio based on open interest is 3.80 (19 puts vs 5 calls), and 10.00 based on today's volume. A ratio above 1 means more puts than calls.

What is KRYS's implied volatility?

At-the-money implied volatility for KRYS options expiring May 21, 2027 is about 48.5%, an annualized estimate of how much the market expects Krystal Biotech stock to move.

How many KRYS option expiration dates are there?

KRYS has 6 listed expiration dates, from Oct 16, 2026 to Jun 17, 2027.

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.