CENX Option Overview

809 calls and 522 puts traded on Nov 4, 2026, 1.33K contracts in total. Open interest was 64.13K contracts. Over the past 30 days, volume averaged 2.31K contracts per day. The CENX option volume chart shows volume by strike and expiration date.

Century Aluminum IV rank is 12, so its 30-day implied volatility of 74.1% is near the bottom of its one-year range. Over the past year it ranged from 55.0% on Sep 23, 2026 to 211.9% on Jul 17, 2026. See the CENX implied volatility history for a longer view.

The Century Aluminum put/call volume ratio was 0.65 on Nov 4, 2026, so calls outnumber puts. The put/call open interest ratio was 0.41. The CENX open interest chart shows calls and puts at each strike.

As of the Nov 4, 2026 close, max pain for Century Aluminum options about one week from expiration was $34.89, 6.4% above the $32.80 close. The CENX max pain chart shows it for every expiration date.

Based on 7-day implied volatility of 80.4%, options price a move of about ±$3.65 (±11.1%) over the next week, a range of roughly $29.15 to $36.45 from the Nov 4, 2026 close. The CENX expected move chart shows it for every expiration date.