IOSP Open Interest
Innospec Inc (IOSP) had 81 open option contracts as of Nov 4, 2026: 70 calls and 11 puts. Open interest rose 118.9% over the past four weeks. The put/call open interest ratio is 0.16, so calls outnumber puts.
Open Interest by Strike
Showing results for IOSP, 2026-11-20(m), calls & puts
Open Interest Stats
Showing results for IOSP, 2026-11-20(m), calls & puts
| Call Open Interest Total | |
|---|---|
| Put Open Interest Total | |
| Open Interest Total | |
| Put-Call Open Interest Ratio |
Highest Open Interest Options
Showing results for IOSP, 2026-11-20(m), calls & puts
Open Interest Total by Expiry
Showing results for IOSP, 2026-11-20(m), calls & puts. View all expiries
Open Interest History
Showing daily totals for IOSP, all expirations, calls & puts. View full history
IOSP Open Interest FAQ
What is open interest?
Open interest is the number of option contracts that are open and not yet closed, exercised, or expired. The Options Clearing Corporation calculates it once a day from the previous day's trades, and it is published before the market opens.
How much open interest does IOSP have?
Innospec had 81 open option contracts as of Nov 4, 2026. Over the past 30 days, open interest averaged 42 contracts.
Is IOSP open interest rising or falling?
Open interest rose 118.9% over the past four weeks. It was 37 contracts on Oct 7, 2026. See the IOSP open interest history for a longer view.
What is the IOSP put/call open interest ratio?
The Innospec put/call open interest ratio was 0.16 as of Nov 4, 2026. Four weeks earlier it was 0.28.
What is Innospec Inc?
Innospec Inc manufactures and sells a variety of chemicals and fuel additives.