Put-Call Ratio (Volume) (90-Day)

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

Protagonist Therapeutics, Inc. (PTGX) had 90-Day Put-Call Ratio (Volume) of 0.0000 for 2026-10-19.

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Figures for 2026-10-19

Volatility Metrics
Historical Volatility (Close-to-Close)	0.3549
Historical Volatility (Parkinson)	0.3717
Implied Volatility (Calls)	0.3963
Implied Volatility (Puts)	0.3732
Implied Volatility (Mean)	0.3848
Put-Call Implied Volatility Ratio	0.9416
Implied Volatility Skew	-0.0114
Option Statistics
Put-Call Ratio (Volume)	0.0000
Put-Call Ratio (Open Interest)	0.3490