Put-Call Ratio (Open Interest) (20-Day)

Put-Call Ratio (Open Interest): The ratio of outstanding put contracts to outstanding call contracts at the close of the trading day, for options with the relevant expiration date.

Immunocore Holdings PLC Sponsored ADR (IMCR) had 20-Day Put-Call Ratio (Open Interest) of 0.1000 for 2025-08-26.

For much more extensive volatility insights, check out our new product VolVue:

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 2025-08-26

Volatility Metrics
Historical Volatility (Close-to-Close)	0.1866
Historical Volatility (Parkinson)	0.3988
Implied Volatility (Calls)	0.5521
Implied Volatility (Puts)	0.5143
Implied Volatility (Mean)	0.5332
Put-Call Implied Volatility Ratio	0.9315
Implied Volatility Skew	-0.0204
Option Statistics
Put-Call Ratio (Volume)	--
Put-Call Ratio (Open Interest)	0.1000