MRK Unusual Option Activity
Merck & Co Inc (MRK) option volume on Nov 4, 2026 was 3.2% of open interest, below the 20-day average of 5.2%. Calls made up 59.6% of the volume.
MRK Unusual Options FAQ
What makes option activity unusual?
Option activity is usually called unusual when a contract trades much more volume than its open interest, which can mean traders are opening new positions.
Is MRK seeing unusual options activity?
On Nov 4, 2026, Merck options traded 16.49K contracts against 522.45K open, a volume to open interest ratio of 0.03, below its 20-day average. The table above lists the contracts with the highest ratios.
Are MRK traders trading more calls or puts?
Calls made up 59.6% of Merck option volume on Nov 4, 2026, a put/call ratio of 0.68, so calls outnumber puts. The MRK option volume chart shows calls and puts by strike.
What is Merck & Co Inc?
Merck makes pharmaceutical products to treat several conditions in a number of therapeutic areas, including cardiometabolic disease, cancer, and infections.