Korro Bio (KRRO) Options Chain
NASDAQ: KRROHealth CareBiotechnology: Pharmaceutical PreparationsUSD
Market open · Delayed 15 min · as of Oct 9, 10:03 AM ET
Expiration date
- Expiration
- Oct 16, 2026
- Days to expiration
- 7
- Share price
- $10.69
- Put/call ratio (OI)
- 0.10
- Put/call ratio (volume)
- 0.11
- ATM implied volatility
- 121.1%
- Expected move
- ±$1.79
- Open interest (C / P)
- 660 / 67
KRRO options summary
The KRRO options chain for the October 16, 2026 expiration lists 8 call and 2 put contracts, with 7 days until expiration. Open interest stands at 660 calls and 67 puts, a put/call ratio of 0.10, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $10.00 strike is 121.1%, which implies the market expects a move of about ±$1.79 (16.8%) in Korro Bio stock by expiration.
The most open interest sits at the $10.00 call (642 contracts) and the $10.00 put (67 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
KRRO options chain · October 16, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 4.21 | 0.90 | 5.50 | 7.50 | — | — | — | |||||
| 0.90 | 0.65 | 1.05 | 10.00 | 0.00 | 1.50 | 0.90 | |||||
| 1.90 | 0.00 | 0.00 | 12.50 | 0.00 | 0.00 | 1.25 | |||||
| 2.93 | 0.00 | 0.00 | 15.00 | — | — | — | |||||
| 0.05 | 0.00 | 0.00 | 17.50 | — | — | — | |||||
| 1.20 | 0.00 | 4.90 | 20.00 | — | — | — | |||||
| 1.30 | 0.00 | 4.90 | 22.50 | — | — | — | |||||
| 1.25 | 0.00 | 4.90 | 25.00 | — | — | — | |||||
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 October 16, 2026 expiration, the KRRO put/call ratio based on open interest is 0.10 (67 puts vs 660 calls), and 0.11 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 October 16, 2026 is about 121.1%, 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.