105 calls and 0 puts traded on Nov 4, 2026, 105 contracts in total. Open interest was 310 contracts. Over the past 30 days, volume averaged 12 contracts per day. The CWT option volume chart shows volume by strike and expiration date.

California Water Service IV rank is 16, so its 30-day implied volatility of 43.0% is near the bottom of its one-year range. Over the past year it ranged from 16.7% on Nov 24, 2025 to 179.5% on Jan 16, 2026. See the CWT implied volatility history for a longer view.

The California Water Service put/call volume ratio was 0.00 on Nov 4, 2026, so calls outnumber puts. The put/call open interest ratio was 0.52. The CWT open interest chart shows calls and puts at each strike.

As of the Nov 4, 2026 close, max pain for California Water Service options about one week from expiration was $44.14, 11.7% below the $49.98 close. The CWT max pain chart shows it for every expiration date.

Based on 7-day implied volatility of 60.4%, options price a move of about ±$4.18 (±8.4%) over the next week, a range of roughly $45.80 to $54.16 from the Nov 4, 2026 close. The CWT expected move chart shows it for every expiration date.