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.

Sutro Biopharma, Inc. (STRO) 90-Day Put-Call Ratio (Volume) data is not available for 2026-10-20.

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Figures for 2026-10-20

Volatility Metrics
Historical Volatility (Close-to-Close)	0.7312
Historical Volatility (Parkinson)	0.7818
Implied Volatility (Calls)	1.0833
Implied Volatility (Puts)	1.2998
Implied Volatility (Mean)	1.1916
Put-Call Implied Volatility Ratio	1.1998
Implied Volatility Skew	0.2045
Option Statistics
Put-Call Ratio (Volume)	--
Put-Call Ratio (Open Interest)	1.1765