Gossamer Bio (GOSS) Options Chain
NASDAQ: GOSSHealth 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
- $9.31
- Put/call ratio (OI)
- 0.09
- Put/call ratio (volume)
- 0.23
- ATM implied volatility
- 985.9%
- Expected move
- ±$30.39
- Open interest (C / P)
- 2.44K / 229
GOSS options summary
The GOSS options chain for the November 20, 2026 expiration lists 4 call and 5 put contracts, with 40 days until expiration. Open interest stands at 2,442 calls and 229 puts, a put/call ratio of 0.09, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $3.00 strike is 985.9%, which implies the market expects a move of about ±$30.39 (326.4%) in Gossamer Bio stock by expiration.
The most open interest sits at the $0.50 call (2.41K contracts) and the $0.50 put (222 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
GOSS options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 0.03 | 0.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.35 | |||||
| 0.02 | 0.00 | 0.00 | 1.00 | 0.00 | 0.00 | 0.95 | |||||
| 0.15 | 0.00 | 0.15 | 1.50 | 0.90 | 1.50 | 1.50 | |||||
| — | — | — | 2.00 | 1.45 | 2.20 | 2.00 | |||||
| 0.18 | 0.00 | 0.15 | 3.00 | 2.00 | 3.00 | 3.00 | |||||
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 GOSS put/call ratio?
For the November 20, 2026 expiration, the GOSS put/call ratio based on open interest is 0.09 (229 puts vs 2,442 calls), and 0.23 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 November 20, 2026 is about 985.9%, 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.