Put-Call Ratio (Volume) (30-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 30-Day Put-Call Ratio (Volume) of 5.0000 for 2025-10-13.

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Figures for 2025-10-13

Volatility Metrics
Historical Volatility (Close-to-Close)	0.6421
Historical Volatility (Parkinson)	0.6115
Implied Volatility (Calls)	1.5468
Implied Volatility (Puts)	1.5214
Implied Volatility (Mean)	1.5341
Put-Call Implied Volatility Ratio	0.9836
Implied Volatility Skew	0.3197
Option Statistics
Put-Call Ratio (Volume)	5.0000
Put-Call Ratio (Open Interest)	0.5161