Geron (GERN) Options Chain
NASDAQ: GERNHealth 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
- $1.23
- Put/call ratio (OI)
- 0.13
- Put/call ratio (volume)
- 0.23
- Expected move
- ±$0.3635
- Open interest (C / P)
- 2.29K / 301
GERN options summary
The GERN options chain for the December 18, 2026 expiration lists 7 call and 3 put contracts, with 68 days until expiration. Open interest stands at 2,290 calls and 301 puts, a put/call ratio of 0.13, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $1.00 strike is 68.8%, which implies the market expects a move of about ±$0.3635 (29.7%) in Geron stock by expiration.
The most open interest sits at the $2.00 call (1.01K contracts) and the $1.00 put (214 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
GERN options chain · December 18, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 0.75 | 0.35 | 1.25 | 0.50 | 0.00 | 0.00 | 0.03 | |||||
| 0.30 | 0.00 | 0.50 | 1.00 | 0.00 | 0.15 | 0.10 | |||||
| 0.10 | 0.10 | 0.15 | 1.50 | 0.00 | 0.85 | 0.41 | |||||
| 0.05 | 0.05 | 0.10 | 2.00 | — | — | — | |||||
| 0.05 | 0.00 | 0.15 | 3.00 | — | — | — | |||||
| 0.10 | 0.00 | 0.00 | 4.00 | — | — | — | |||||
| 0.05 | 0.00 | 0.45 | 5.00 | — | — | — | |||||
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 GERN put/call ratio?
For the December 18, 2026 expiration, the GERN put/call ratio based on open interest is 0.13 (301 puts vs 2,290 calls), and 0.23 based on today's volume. A ratio above 1 means more puts than calls.
What is GERN's implied volatility?
At-the-money implied volatility for GERN options expiring December 18, 2026 is about 68.8%, an annualized estimate of how much the market expects Geron stock to move.
How many GERN option expiration dates are there?
GERN has 7 listed expiration dates, from Oct 16, 2026 to Jan 19, 2029.
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.