Put-Call Ratio (Volume) (20-Day)

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

Pacific Biosciences of California, Inc. (PACB) had 20-Day Put-Call Ratio (Volume) of 1.8060 for 2026-04-20.

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Figures for 2026-04-20

Volatility Metrics
Historical Volatility (Close-to-Close)	0.6702
Historical Volatility (Parkinson)	0.7101
Implied Volatility (Calls)	0.8834
Implied Volatility (Puts)	1.1500
Implied Volatility (Mean)	1.0167
Put-Call Implied Volatility Ratio	1.3019
Implied Volatility Skew	-0.1084
Option Statistics
Put-Call Ratio (Volume)	1.8060
Put-Call Ratio (Open Interest)	0.0647