Sionna Therapeutics (SION) Options Chain
NASDAQ: SIONHealth CareBiotechnology: Pharmaceutical PreparationsUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Nov 20, 2026
- Days to expiration
- 40
- Share price
- $4.90
- Put/call ratio (OI)
- 0.61
- Put/call ratio (volume)
- 0.03
- ATM implied volatility
- 178.1%
- Expected move
- ±$2.89
- Open interest (C / P)
- 117 / 71
SION options summary
The SION options chain for the November 20, 2026 expiration lists 3 call and 3 put contracts, with 40 days until expiration. Open interest stands at 117 calls and 71 puts, a put/call ratio of 0.61, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $5.00 strike is 178.1%, which implies the market expects a move of about ±$2.89 (59.0%) in Sionna Therapeutics stock by expiration.
The most open interest sits at the $5.00 call (98 contracts) and the $2.50 put (60 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
SION options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| — | — | — | 2.50 | 0.00 | 2.65 | 0.05 | |||||
| 0.90 | 0.20 | 0.90 | 5.00 | 0.05 | 3.40 | 0.88 | |||||
| 0.12 | 0.00 | 0.50 | 7.50 | 0.10 | 4.90 | 1.30 | |||||
| 0.30 | 0.00 | 1.40 | 10.00 | — | — | — | |||||
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 November 20, 2026 expiration, the SION put/call ratio based on open interest is 0.61 (71 puts vs 117 calls), and 0.03 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 November 20, 2026 is about 178.1%, 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.