11 calls and 13 puts traded on Nov 4, 2026, 24 contracts in total. Open interest was 1.25K contracts. Over the past 30 days, volume averaged 51 contracts per day. The CWST option volume chart shows volume by strike and expiration date.

Casella Waste Systems IV rank is 16, so its 30-day implied volatility of 45.9% is near the bottom of its one-year range. Over the past year it ranged from 20.4% on Dec 22, 2025 to 181.2% on Jul 17, 2026. See the CWST implied volatility history for a longer view.

The Casella Waste Systems put/call volume ratio was 1.18 on Nov 4, 2026, so puts outnumber calls. The put/call open interest ratio was 0.61. The CWST open interest chart shows calls and puts at each strike.

As of the Nov 4, 2026 close, max pain for Casella Waste Systems options about one week from expiration was $81.51, 17.6% below the $98.95 close. The CWST max pain chart shows it for every expiration date.

Based on 7-day implied volatility of 51.0%, options price a move of about ±$6.99 (±7.1%) over the next week, a range of roughly $91.96 to $105.94 from the Nov 4, 2026 close. The CWST expected move chart shows it for every expiration date.