Put-Call Ratio (Volume) (20-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 20-Day Put-Call Ratio (Volume) of 17.1429 for 2026-10-19.

Over 300 data fields encompassing historical volatility, implied volatility, and put-call ratios for multiple time frames
Download data in CSV, Excel, JSON, or XML format
Up to 20 years of data history
52-Week Rank and Percentile for all metrics and time frames

10-Day 20-Day 30-Day 60-Day
90-Day 120-Day 150-Day 180-Day

Figures for 2026-10-19

Volatility Metrics
Historical Volatility (Close-to-Close)	1.1024
Historical Volatility (Parkinson)	0.9975
Implied Volatility (Calls)	--
Implied Volatility (Puts)	1.0986
Implied Volatility (Mean)	--
Put-Call Implied Volatility Ratio	--
Implied Volatility Skew	--
Option Statistics
Put-Call Ratio (Volume)	17.1429
Put-Call Ratio (Open Interest)	0.8041