Gossamer Bio (GOSS) Options Chain
NASDAQ: GOSSHealth CareBiotechnology: Pharmaceutical PreparationsUSD
At close: Oct 8, 4:00 PM ET · Delayed 15 min
After hours: 9.73 -1.52%
Expiration date
- Expiration
- Oct 16, 2026
- Days to expiration
- 8
- Share price
- $9.88
- Put/call ratio (OI)
- 0.10
- Put/call ratio (volume)
- 1.00
- Expected move
- ±$0.7314
- Open interest (C / P)
- 178 / 17
GOSS options summary
The GOSS options chain for the October 16, 2026 expiration lists 2 call and 5 put contracts, with 8 days until expiration. Open interest stands at 178 calls and 17 puts, a put/call ratio of 0.10, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $3.00 strike is 50.0%, which implies the market expects a move of about ±$0.7314 (7.4%) in Gossamer Bio stock by expiration.
The most open interest sits at the $0.50 call (177 contracts) and the $0.50 put (7 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
GOSS options chain · October 16, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 0.05 | 0.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.45 | |||||
| — | — | — | 1.00 | 0.00 | 0.00 | 0.95 | |||||
| — | — | — | 1.50 | 0.00 | 0.00 | 1.45 | |||||
| — | — | — | 2.00 | 0.00 | 0.00 | 1.95 | |||||
| 0.05 | 0.00 | 0.00 | 3.00 | 0.00 | 0.00 | 2.95 | |||||
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 GOSS put/call ratio?
For the October 16, 2026 expiration, the GOSS put/call ratio based on open interest is 0.10 (17 puts vs 178 calls), and 1.00 based on today's volume. A ratio above 1 means more puts than calls.
What is GOSS's implied volatility?
At-the-money implied volatility for GOSS options expiring October 16, 2026 is about 50.0%, an annualized estimate of how much the market expects Gossamer Bio stock to move.
How many GOSS option expiration dates are there?
GOSS has 5 listed expiration dates, from Oct 16, 2026 to Jan 21, 2028.
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.