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.

Cisco Systems, Inc. (CSCO) had 180-Day Put-Call Ratio (Volume) of 2.2558 for 2026-05-21.

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Figures for 2026-05-21

Volatility Metrics
Historical Volatility (Close-to-Close)	0.3605
Historical Volatility (Parkinson)	0.2393
Implied Volatility (Calls)	0.3914
Implied Volatility (Puts)	0.3915
Implied Volatility (Mean)	0.3914
Put-Call Implied Volatility Ratio	1.0002
Implied Volatility Skew	0.0082
Option Statistics
Put-Call Ratio (Volume)	2.2558
Put-Call Ratio (Open Interest)	0.9534