276 calls and 130 puts traded on Nov 4, 2026, 406 contracts in total. Open interest was 19.96K contracts. Over the past 30 days, volume averaged 471 contracts per day. The BMO option volume chart shows volume by strike and expiration date.

Bank of Montreal IV rank is 7, so its 30-day implied volatility of 23.7% is near the bottom of its one-year range. Over the past year it ranged from 12.9% on Dec 19, 2025 to 159.4% on Jul 17, 2026. See the BMO implied volatility history for a longer view.

The Bank of Montreal put/call volume ratio was 0.47 on Nov 4, 2026, so calls outnumber puts. The put/call open interest ratio was 1.00. The BMO open interest chart shows calls and puts at each strike.

As of the Nov 4, 2026 close, max pain for Bank of Montreal options about one week from expiration was $177.80, close to the $177.46 close. The BMO max pain chart shows it for every expiration date.

Based on 7-day implied volatility of 22.7%, options price a move of about ±$5.58 (±3.1%) over the next week, a range of roughly $171.88 to $183.04 from the Nov 4, 2026 close. The BMO expected move chart shows it for every expiration date.