Ferroglobe PLC (GSM) Open Interest History
Open interest tracks the total number of outstanding options contracts. Rising OI alongside price moves can indicate growing commitment to the trend; declining OI suggests positions are being closed.
Ferroglobe PLC (GSM) operates in the Basic Materials sector, specifically the Industrial Materials industry, with a market capitalization near $725.0M, listed on NASDAQ, employing roughly 3,283 people, carrying a beta of 1.03 to the broader market. Ferroglobe PLC operates in the silicon and specialty metals industry in the United States, Europe, and internationally. Led by Marco Levi, public since 2009-07-30.
Snapshot as of May 15, 2026.
- Spot Price
- $3.95
- Call OI
- 13.8K
- Put OI
- 7.5K
- Total OI
- 21.4K
- Put/Call Ratio
- 3.11
As of May 15, 2026, Ferroglobe PLC (GSM) has 21.4K total contracts outstanding across all expirations. Put/call OI ratio is 0.54 (call-heavy positioning). Open interest reflects accumulated positions from prior sessions; persistent growth indicates sustained directional or hedging interest, while sharp drops typically mean post-expiration clean-up.
How GSM open interest history Data Feeds Strategy Selection
Strategy selection on Ferroglobe PLC options does not derive from any single metric in isolation. The open interest history view above sits inside a broader read: ATM IV currently sits at 26.8% and dealer gamma exposure is positive, so dealer hedging is mechanically mean-reverting. Combine the open interest history data here with the volatility-skew surface, dealer-gamma exposure, max-pain level, and upcoming-events calendar to build a positioning thesis. Risk-defined structures (credit spreads, debit spreads, iron condors) are usually safer than naked positions while the regime is uncertain; the data on this page anchors the inputs but does not by itself constitute a trade thesis.
Learn how open interest is reported and how to read the data →
Frequently asked GSM open interest history questions
- What is the current GSM options open interest?
- As of May 15, 2026, Ferroglobe PLC (GSM) has 21.4K total contracts outstanding across all listed expirations, split as 13.8K calls and 7.5K puts. Open interest reflects accumulated positions from prior trading sessions; it does not include today's volume until end-of-day reconciliation.
- What is the GSM put/call open interest ratio?
- Put/call OI ratio of 0.54 is call-heavy, often a directional bullish or upside-speculation signal.
- What does GSM open interest tell traders?
- Persistent OI growth indicates sustained directional or hedging interest; sharp drops typically mean post-expiration position cleanup. Heavy OI concentrations at specific strikes act as support and resistance levels because dealer hedging amplifies near those strikes - the gamma profile of the dealer book is concentrated there. Comparing today's volume to standing OI separates opening flow from closing flow.