Put-Call Ratio (Volume) (10-Day)

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

Upstream Bio, Inc. (UPB) had 10-Day Put-Call Ratio (Volume) of 0.0000 for 2026-07-21.

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Figures for 2026-07-21

Volatility Metrics
Historical Volatility (Close-to-Close)	0.2916
Historical Volatility (Parkinson)	0.4745
Implied Volatility (Calls)	0.8147
Implied Volatility (Puts)	1.4072
Implied Volatility (Mean)	1.1109
Put-Call Implied Volatility Ratio	1.7272
Implied Volatility Skew	1.5186
Option Statistics
Put-Call Ratio (Volume)	0.0000
Put-Call Ratio (Open Interest)	0.4118