Put-Call Ratio (Open Interest) (10-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.

BlackRock (BLK) had 10-Day Put-Call Ratio (Open Interest) of 0.4658 for 2025-12-31.

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Figures for 2025-12-31

Volatility Metrics
Historical Volatility (Close-to-Close)	0.1882
Historical Volatility (Parkinson)	0.1176
Implied Volatility (Calls)	0.2105
Implied Volatility (Puts)	0.2007
Implied Volatility (Mean)	0.2056
Put-Call Implied Volatility Ratio	0.9538
Implied Volatility Skew	0.0905
Option Statistics
Put-Call Ratio (Volume)	2.0574
Put-Call Ratio (Open Interest)	0.4658