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.

Vistra Corp. (VST) had 20-Day Put-Call Ratio (Open Interest) of 2.5466 for 2026-01-16.

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Figures for 2026-01-16

Volatility Metrics
Historical Volatility (Close-to-Close)	0.8038
Historical Volatility (Parkinson)	0.4870
Implied Volatility (Calls)	0.5039
Implied Volatility (Puts)	0.4871
Implied Volatility (Mean)	0.4955
Put-Call Implied Volatility Ratio	0.9665
Implied Volatility Skew	0.0273
Option Statistics
Put-Call Ratio (Volume)	0.4067
Put-Call Ratio (Open Interest)	2.5466