Put-Call Ratio (Volume) (120-Day)

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

Upstream Bio, Inc. (UPB) 120-Day Put-Call Ratio (Volume) data is not available for 2026-04-21.

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Figures for 2026-04-21

Volatility Metrics
Historical Volatility (Close-to-Close)	1.5044
Historical Volatility (Parkinson)	0.9370
Implied Volatility (Calls)	0.8987
Implied Volatility (Puts)	0.4917
Implied Volatility (Mean)	0.6952
Put-Call Implied Volatility Ratio	0.5471
Implied Volatility Skew	--
Option Statistics
Put-Call Ratio (Volume)	--
Put-Call Ratio (Open Interest)	0.0951