Put-Call Ratio (Open Interest) (30-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 30-Day Put-Call Ratio (Open Interest) of 0.9133 for 2026-10-16.

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Figures for 2026-10-16

Volatility Metrics
Historical Volatility (Close-to-Close)	0.5951
Historical Volatility (Parkinson)	0.6414
Implied Volatility (Calls)	1.2846
Implied Volatility (Puts)	1.2622
Implied Volatility (Mean)	1.2734
Put-Call Implied Volatility Ratio	0.9825
Implied Volatility Skew	0.0278
Option Statistics
Put-Call Ratio (Volume)	1.7735
Put-Call Ratio (Open Interest)	0.9133