12 calls and 7 puts traded on Nov 4, 2026, 19 contracts in total. Open interest was 400 contracts. Over the past 30 days, volume averaged 181 contracts per day. The BIO option volume chart shows volume by strike and expiration date.

Bio-Rad Laboratories Inc.Class A IV rank is 16, so its 30-day implied volatility of 50.1% is near the bottom of its one-year range. Over the past year it ranged from 26.6% on Sep 3, 2026 to 176.2% on Jan 16, 2026. See the BIO implied volatility history for a longer view.

The Bio-Rad Laboratories Inc.Class A put/call volume ratio was 0.58 on Nov 4, 2026, so calls outnumber puts. The put/call open interest ratio was 2.08. The BIO open interest chart shows calls and puts at each strike.

As of the Nov 4, 2026 close, max pain for Bio-Rad Laboratories Inc.Class A options about one week from expiration was $388.40, 2.3% above the $379.59 close. The BIO max pain chart shows it for every expiration date.

Based on 7-day implied volatility of 57.4%, options price a move of about ±$30.19 (±8.0%) over the next week, a range of roughly $349.40 to $409.78 from the Nov 4, 2026 close. The BIO expected move chart shows it for every expiration date.