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 5.1659 for 2026-02-20.

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Figures for 2026-02-20

Volatility Metrics
Historical Volatility (Close-to-Close)	0.2467
Historical Volatility (Parkinson)	0.3411
Implied Volatility (Calls)	0.2880
Implied Volatility (Puts)	0.2752
Implied Volatility (Mean)	0.2816
Put-Call Implied Volatility Ratio	0.9553
Implied Volatility Skew	0.0838
Option Statistics
Put-Call Ratio (Volume)	5.0504
Put-Call Ratio (Open Interest)	5.1659