BMO Open Interest
Bank of Montreal (BMO) had 19.96K open option contracts as of Nov 4, 2026: 10.0K calls and 9.95K puts. Open interest rose 1.9% over the past four weeks. The put/call open interest ratio is 1.00, so calls and puts are about even.
Open Interest by Strike
Showing results for BMO, 2026-11-20(m), calls & puts
Open Interest Stats
Showing results for BMO, 2026-11-20(m), 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 BMO, 2026-11-20(m), calls & puts
Open Interest Total by Expiry
Showing results for BMO, 2026-11-20(m), calls & puts. View all expiries
Open Interest History
Showing daily totals for BMO, all expirations, calls & puts. View full history
BMO 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 BMO have?
Bank of Montreal had 19.96K open option contracts as of Nov 4, 2026. Over the past 30 days, open interest averaged 19.27K contracts.
Is BMO open interest rising or falling?
Open interest rose 1.9% over the past four weeks. It was 19.59K contracts on Oct 7, 2026. See the BMO open interest history for a longer view.
What is the BMO put/call open interest ratio?
The Bank of Montreal put/call open interest ratio was 1.00 as of Nov 4, 2026. Four weeks earlier it was 1.04.
What is Bank of Montreal?
Bank of Montreal is a diversified financial services provider based in North America with over CAD 1.5 trillion in assets by the end of July 2026.