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.

HDFC Bank Limited (HDB) had 20-Day Put-Call Ratio (Open Interest) of 1.0616 for 2026-01-20.

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Figures for 2026-01-20

Volatility Metrics
Historical Volatility (Close-to-Close)	0.3126
Historical Volatility (Parkinson)	0.2088
Implied Volatility (Calls)	--
Implied Volatility (Puts)	0.2001
Implied Volatility (Mean)	--
Put-Call Implied Volatility Ratio	--
Implied Volatility Skew	--
Option Statistics
Put-Call Ratio (Volume)	0.2917
Put-Call Ratio (Open Interest)	1.0616