1 calls and 1 puts traded on Nov 4, 2026, 2 contracts in total. Open interest was 609 contracts. Over the past 30 days, volume averaged 136 contracts per day. The NWE option volume chart shows volume by strike and expiration date.

NorthWestern Energy IV rank is 11, so its 30-day implied volatility of 31.3% is near the bottom of its one-year range. Over the past year it ranged from 15.1% on Jun 26, 2026 to 167.0% on Jan 16, 2026. See the NWE implied volatility history for a longer view.

The NorthWestern Energy put/call volume ratio was 1.00 on Nov 4, 2026, so calls and puts are about even. The put/call open interest ratio was 0.08. The NWE open interest chart shows calls and puts at each strike.

As of the Nov 4, 2026 close, max pain for NorthWestern Energy options about one week from expiration was $76.08, 7.2% below the $81.96 close. The NWE max pain chart shows it for every expiration date.

Based on 7-day implied volatility of 38.6%, options price a move of about ±$4.38 (±5.3%) over the next week, a range of roughly $77.58 to $86.34 from the Nov 4, 2026 close. The NWE expected move chart shows it for every expiration date.