778 calls and 148 puts traded on Nov 4, 2026, 926 contracts in total. Open interest was 234.64K contracts. Over the past 30 days, volume averaged 8.26K contracts per day. The PACB option volume chart shows volume by strike and expiration date.

Pacific Biosciences of California IV rank is 51, so its 30-day implied volatility of 152.6% is near the middle of its one-year range. Over the past year it ranged from 54.9% on Aug 24, 2026 to 246.3% on Jul 29, 2026. See the PACB implied volatility history for a longer view.

The Pacific Biosciences of California put/call volume ratio was 0.19 on Nov 4, 2026, so calls outnumber puts. The put/call open interest ratio was 0.08. The PACB open interest chart shows calls and puts at each strike.

As of the Nov 4, 2026 close, max pain for Pacific Biosciences of California options about one week from expiration was $2.01, 21.7% below the $2.57 close. The PACB max pain chart shows it for every expiration date.

Based on 7-day implied volatility of 172.8%, options price a move of about ±$0.62 (±23.9%) over the next week, a range of roughly $1.95 to $3.19 from the Nov 4, 2026 close. The PACB expected move chart shows it for every expiration date.