Put-Call Ratio (Volume) (180-Day)

Put-Call Ratio (Volume): The ratio of puts traded to calls traded, for options with the relevant expiration date.

Merck & Co., Inc. (MRK) had 180-Day Put-Call Ratio (Volume) of 0.4209 for 2026-10-05.

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Figures for 2026-10-05

Volatility Metrics
Historical Volatility (Close-to-Close)	0.3219
Historical Volatility (Parkinson)	0.2409
Implied Volatility (Calls)	0.3360
Implied Volatility (Puts)	0.3172
Implied Volatility (Mean)	0.3266
Put-Call Implied Volatility Ratio	0.9442
Implied Volatility Skew	0.0218
Option Statistics
Put-Call Ratio (Volume)	0.4209
Put-Call Ratio (Open Interest)	0.8176