Sionna Therapeutics (SION) Options Chain
NASDAQ: SIONHealth CareBiotechnology: Pharmaceutical PreparationsUSD
Market open · Delayed 15 min · as of Oct 9, 9:30 AM ET
Expiration date
- Expiration
- Oct 16, 2026
- Days to expiration
- 7
- Share price
- $4.96
- Put/call ratio (OI)
- 0.41
- Put/call ratio (volume)
- 5.66
- Expected move
- ±$0.0215
- Open interest (C / P)
- 2.68K / 1.11K
SION options summary
The SION options chain for the October 16, 2026 expiration lists 17 call and 12 put contracts, with 7 days until expiration. Open interest stands at 2,684 calls and 1,109 puts, a put/call ratio of 0.41, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $5.00 strike is 3.1%, which implies the market expects a move of about ±$0.0215 (0.4%) in Sionna Therapeutics stock by expiration.
The most open interest sits at the $17.50 call (713 contracts) and the $40.00 put (471 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
SION options chain · October 16, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 2.90 | 0.00 | 0.00 | 2.50 | — | — | — | |||||
| 0.25 | 0.00 | 0.00 | 5.00 | 0.00 | 0.00 | 0.47 | |||||
| 0.05 | 0.00 | 0.00 | 7.50 | 0.00 | 0.00 | 2.50 | |||||
| 0.05 | 0.00 | 0.00 | 10.00 | — | — | — | |||||
| 1.41 | 0.00 | 0.00 | 12.50 | — | — | — | |||||
| 0.01 | 0.00 | 0.00 | 17.50 | 0.00 | 0.00 | 2.25 | |||||
| 1.33 | 0.00 | 0.00 | 20.00 | 0.00 | 0.00 | 14.90 | |||||
| 25.80 | 16.40 | 20.50 | 22.50 | 0.00 | 0.00 | 17.39 | |||||
| — | — | — | 25.00 | 0.00 | 0.00 | 20.00 | |||||
| 27.20 | 0.00 | 0.00 | 30.00 | 0.00 | 0.00 | 24.10 | |||||
| 25.20 | 0.00 | 0.00 | 35.00 | 0.00 | 0.00 | 7.10 | |||||
| 18.40 | 0.00 | 0.00 | 40.00 | 0.00 | 0.00 | 34.80 | |||||
| 0.08 | 0.00 | 0.00 | 45.00 | 0.00 | 0.00 | 14.80 | |||||
| 0.05 | 0.00 | 0.00 | 50.00 | 0.00 | 0.00 | 20.00 | |||||
| 0.08 | 0.00 | 0.00 | 55.00 | — | — | — | |||||
| 0.05 | 0.00 | 0.00 | 60.00 | 34.00 | 38.00 | 32.50 | |||||
| 12.40 | 0.00 | 0.00 | 65.00 | — | — | — | |||||
| 0.10 | 0.00 | 0.00 | 70.00 | — | — | — | |||||
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 SION put/call ratio?
For the October 16, 2026 expiration, the SION put/call ratio based on open interest is 0.41 (1,109 puts vs 2,684 calls), and 5.66 based on today's volume. A ratio above 1 means more puts than calls.
What is SION's implied volatility?
At-the-money implied volatility for SION options expiring October 16, 2026 is about 3.1%, an annualized estimate of how much the market expects Sionna Therapeutics stock to move.
How many SION option expiration dates are there?
SION 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.