Ferroglobe (GSM) Options Chain
NASDAQ: GSMBasic MaterialsMetal MiningUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Dec 18, 2026
- Days to expiration
- 68
- Share price
- $4.24
- Put/call ratio (OI)
- 0.73
- Put/call ratio (volume)
- 0.54
- Expected move
- ±$1.13
- Open interest (C / P)
- 9.84K / 7.23K
GSM options summary
The GSM options chain for the December 18, 2026 expiration lists 8 call and 4 put contracts, with 68 days until expiration. Open interest stands at 9,837 calls and 7,229 puts, a put/call ratio of 0.73, which is fairly balanced between calls and puts. At-the-money implied volatility near the $4.00 strike is 61.8%, which implies the market expects a move of about ±$1.13 (26.7%) in Ferroglobe stock by expiration.
The most open interest sits at the $4.00 call (6.69K contracts) and the $4.00 put (6.17K contracts).
Summary generated from market data by MetaCap's automated system. Methodology
GSM options chain · December 18, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 3.03 | 2.70 | 3.80 | 1.00 | — | — | — | |||||
| 1.50 | 1.65 | 2.80 | 2.00 | 0.00 | 0.75 | 0.40 | |||||
| 1.45 | 0.00 | 0.00 | 3.00 | 0.00 | 0.75 | 0.35 | |||||
| 0.70 | 0.25 | 1.00 | 4.00 | 0.20 | 0.35 | 0.47 | |||||
| 0.23 | 0.15 | 0.35 | 5.00 | 0.85 | 1.35 | 0.90 | |||||
| 0.10 | 0.00 | 0.20 | 6.00 | — | — | — | |||||
| 0.10 | 0.00 | 0.45 | 7.00 | — | — | — | |||||
| 0.05 | 0.00 | 0.00 | 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 GSM put/call ratio?
For the December 18, 2026 expiration, the GSM put/call ratio based on open interest is 0.73 (7,229 puts vs 9,837 calls), and 0.54 based on today's volume. A ratio above 1 means more puts than calls.
What is GSM's implied volatility?
At-the-money implied volatility for GSM options expiring December 18, 2026 is about 61.8%, an annualized estimate of how much the market expects Ferroglobe stock to move.
How many GSM option expiration dates are there?
GSM has 6 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.