Put-Call Ratio (Open Interest) (120-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.

Summit Therapeutics PLC (SMMT) had 120-Day Put-Call Ratio (Open Interest) of 0.7629 for 2026-01-20.

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Figures for 2026-01-20

Volatility Metrics
Historical Volatility (Close-to-Close)	0.6008
Historical Volatility (Parkinson)	0.5779
Implied Volatility (Calls)	0.8225
Implied Volatility (Puts)	0.8123
Implied Volatility (Mean)	0.8174
Put-Call Implied Volatility Ratio	0.9876
Implied Volatility Skew	0.0545
Option Statistics
Put-Call Ratio (Volume)	2.9897
Put-Call Ratio (Open Interest)	0.7629