1.41K calls and 1.31K puts traded on Nov 4, 2026, 2.72K contracts in total. Open interest was 23.85K contracts. Over the past 30 days, volume averaged 1.82K contracts per day. The FIX option volume chart shows volume by strike and expiration date.

Comfort Systems USA IV rank is 20, so its 30-day implied volatility of 72.3% is near the bottom of its one-year range. Over the past year it ranged from 46.3% on Nov 5, 2025 to 180.6% on Oct 16, 2026. See the FIX implied volatility history for a longer view.

The Comfort Systems USA put/call volume ratio was 0.93 on Nov 4, 2026, so calls outnumber puts. The put/call open interest ratio was 1.00. The FIX open interest chart shows calls and puts at each strike.

As of the Nov 4, 2026 close, max pain for Comfort Systems USA options about one week from expiration was $1,350.44, 24.0% above the $1,089.39 close. The FIX max pain chart shows it for every expiration date.

Based on 7-day implied volatility of 75.6%, options price a move of about ±$113.99 (±10.5%) over the next week, a range of roughly $975.40 to $1,203.38 from the Nov 4, 2026 close. The FIX expected move chart shows it for every expiration date.