MOS Open Interest
The Mosaic Company (MOS) had 417.34K open option contracts as of Nov 4, 2026: 248.41K calls and 168.93K puts. Open interest rose 10.5% over the past four weeks, and is MOS's highest level in 4 weeks. The put/call open interest ratio is 0.68, so calls outnumber puts.
Open Interest by Strike
Showing results for MOS, 2026-11-06(w), calls & puts
Open Interest Stats
Showing results for MOS, 2026-11-06(w), calls & puts
| Call Open Interest Total | |
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| Put Open Interest Total | |
| Open Interest Total | |
| Put-Call Open Interest Ratio |
Highest Open Interest Options
Showing results for MOS, 2026-11-06(w), calls & puts
Open Interest Total by Expiry
Showing results for MOS, 2026-11-06(w), calls & puts. View all expiries
Open Interest History
Showing daily totals for MOS, all expirations, calls & puts. View full history
MOS 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 MOS have?
Mosaic had 417.34K open option contracts as of Nov 4, 2026. Over the past 30 days, open interest averaged 393.22K contracts.
Is MOS open interest rising or falling?
Open interest rose 10.5% over the past four weeks, and is MOS's highest level in 4 weeks. It was 377.84K contracts on Oct 7, 2026. See the MOS open interest history for a longer view.
What is the MOS put/call open interest ratio?
The Mosaic put/call open interest ratio was 0.68 as of Nov 4, 2026. Four weeks earlier it was 0.69.
What is The Mosaic Company?
Mosaic is one of the largest phosphate and potash producers in the world.