Ferroglobe (GSM) Options Chain
NASDAQ: GSMBasic MaterialsMetal MiningUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Nov 20, 2026
- Days to expiration
- 39
- Share price
- $4.24
- Put/call ratio (OI)
- 3.50
- Expected move
- ±$1.08
- Open interest (C / P)
- 6 / 21
GSM options summary
The GSM options chain for the November 20, 2026 expiration lists 1 call and 1 put contracts, with 39 days until expiration. Open interest stands at 6 calls and 21 puts, a put/call ratio of 3.50, which is more bearish, with puts outnumbering calls. At-the-money implied volatility near the $4.00 strike is 77.7%, which implies the market expects a move of about ±$1.08 (25.4%) in Ferroglobe stock by expiration.
The most open interest sits at the $4.00 call (6 contracts) and the $5.00 put (21 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
GSM options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 0.43 | 0.20 | 0.90 | 4.00 | — | — | — | |||||
| — | — | — | 5.00 | 0.55 | 1.25 | 1.10 | |||||
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 November 20, 2026 expiration, the GSM put/call ratio based on open interest is 3.50 (21 puts vs 6 calls). A ratio above 1 means more puts than calls.
What is GSM's implied volatility?
At-the-money implied volatility for GSM options expiring November 20, 2026 is about 77.7%, 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.