Korro Bio (KRRO) Options Chain
NASDAQ: KRROHealth CareBiotechnology: Pharmaceutical PreparationsUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Dec 18, 2026
- Days to expiration
- 68
- Share price
- $10.16
- Put/call ratio (OI)
- 1.72
- Put/call ratio (volume)
- 0.61
- ATM implied volatility
- 163.8%
- Expected move
- ±$7.18
- Open interest (C / P)
- 128 / 220
KRRO options summary
The KRRO options chain for the December 18, 2026 expiration lists 15 call and 7 put contracts, with 68 days until expiration. Open interest stands at 128 calls and 220 puts, a put/call ratio of 1.72, which is more bearish, with puts outnumbering calls. At-the-money implied volatility near the $10.00 strike is 163.8%, which implies the market expects a move of about ±$7.18 (70.7%) in Korro Bio stock by expiration.
The most open interest sits at the $35.00 call (62 contracts) and the $2.50 put (153 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
KRRO options chain · December 18, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 9.80 | 5.90 | 10.00 | 2.50 | 0.00 | 4.90 | 0.05 | |||||
| 10.40 | 6.00 | 10.50 | 5.00 | 0.00 | 0.25 | 0.10 | |||||
| 3.61 | 0.00 | 0.00 | 7.50 | 0.20 | 0.85 | 0.40 | |||||
| 5.90 | 0.00 | 0.00 | 10.00 | 0.55 | 4.90 | 2.30 | |||||
| 5.80 | 0.00 | 0.00 | 12.50 | 0.00 | 0.00 | 2.00 | |||||
| 2.15 | 0.00 | 3.00 | 15.00 | — | — | — | |||||
| 1.40 | 0.00 | 0.00 | 17.50 | 0.00 | 0.00 | 7.15 | |||||
| 1.60 | 0.00 | 4.90 | 20.00 | 11.70 | 14.50 | 15.40 | |||||
| 1.50 | 0.05 | 2.75 | 22.50 | — | — | — | |||||
| 0.80 | 0.00 | 4.90 | 25.00 | — | — | — | |||||
| 0.65 | 0.00 | 4.90 | 30.00 | — | — | — | |||||
| 0.54 | 0.00 | 4.90 | 35.00 | — | — | — | |||||
| 0.55 | 0.00 | 0.00 | 40.00 | — | — | — | |||||
| 0.50 | 0.00 | 0.00 | 45.00 | — | — | — | |||||
| 0.50 | 0.00 | 0.00 | 50.00 | — | — | — | |||||
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 KRRO put/call ratio?
For the December 18, 2026 expiration, the KRRO put/call ratio based on open interest is 1.72 (220 puts vs 128 calls), and 0.61 based on today's volume. A ratio above 1 means more puts than calls.
What is KRRO's implied volatility?
At-the-money implied volatility for KRRO options expiring December 18, 2026 is about 163.8%, an annualized estimate of how much the market expects Korro Bio stock to move.
How many KRRO option expiration dates are there?
KRRO has 4 listed expiration dates, from Oct 16, 2026 to Apr 16, 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.