Keros Therapeutics (KROS) Options Chain
NASDAQ: KROSHealth 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
- $11.95
- Put/call ratio (OI)
- 0.32
- Put/call ratio (volume)
- 1.50
- ATM implied volatility
- 116.9%
- Expected move
- ±$6.03
- Open interest (C / P)
- 79 / 25
KROS options summary
The KROS options chain for the December 18, 2026 expiration lists 7 call and 6 put contracts, with 68 days until expiration. Open interest stands at 79 calls and 25 puts, a put/call ratio of 0.32, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $12.50 strike is 116.9%, which implies the market expects a move of about ±$6.03 (50.5%) in Keros Therapeutics stock by expiration.
The most open interest sits at the $20.00 call (22 contracts) and the $10.00 put (9 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
KROS options chain · December 18, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 3.30 | 0.00 | 0.00 | 7.50 | 0.00 | 4.90 | 0.34 | |||||
| 2.00 | 0.10 | 4.90 | 10.00 | 0.00 | 1.50 | 0.85 | |||||
| 1.10 | 0.20 | 4.80 | 12.50 | 0.35 | 4.50 | 2.10 | |||||
| 0.40 | 0.00 | 1.90 | 15.00 | 3.30 | 7.50 | 4.20 | |||||
| 0.05 | 0.00 | 0.25 | 17.50 | 5.20 | 10.00 | 6.10 | |||||
| 0.50 | 0.00 | 1.70 | 20.00 | 7.70 | 12.50 | 8.30 | |||||
| 0.50 | 0.00 | 4.90 | 22.50 | — | — | — | |||||
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 KROS put/call ratio?
For the December 18, 2026 expiration, the KROS put/call ratio based on open interest is 0.32 (25 puts vs 79 calls), and 1.50 based on today's volume. A ratio above 1 means more puts than calls.
What is KROS's implied volatility?
At-the-money implied volatility for KROS options expiring December 18, 2026 is about 116.9%, an annualized estimate of how much the market expects Keros Therapeutics stock to move.
How many KROS option expiration dates are there?
KROS has 4 listed expiration dates, from Oct 16, 2026 to Mar 19, 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.