736 calls and 2.32K puts traded on Nov 4, 2026, 3.06K contracts in total. Open interest was 17.7K contracts. Over the past 30 days, volume averaged 838 contracts per day. The MKSI option volume chart shows volume by strike and expiration date.

MKS IV rank is 20, so its 30-day implied volatility of 76.9% is near the bottom of its one-year range. Over the past year it ranged from 42.1% on Dec 26, 2025 to 219.5% on Jul 17, 2026. See the MKSI implied volatility history for a longer view.

The MKS put/call volume ratio was 3.15 on Nov 4, 2026, so puts outnumber calls. The put/call open interest ratio was 0.41. The MKSI open interest chart shows calls and puts at each strike.

As of the Nov 4, 2026 close, max pain for MKS options about one week from expiration was $230.74, 17.9% above the $195.72 close. The MKSI max pain chart shows it for every expiration date.

Based on 7-day implied volatility of 85.0%, options price a move of about ±$23.05 (±11.8%) over the next week, a range of roughly $172.67 to $218.77 from the Nov 4, 2026 close. The MKSI expected move chart shows it for every expiration date.