Put-Call Ratio (Open Interest) (60-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 60-Day Put-Call Ratio (Open Interest) of 0.8546 for 2026-08-20.

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Figures for 2026-08-20

Volatility Metrics
Historical Volatility (Close-to-Close)	0.3045
Historical Volatility (Parkinson)	0.2345
Implied Volatility (Calls)	0.2573
Implied Volatility (Puts)	0.2438
Implied Volatility (Mean)	0.2505
Put-Call Implied Volatility Ratio	0.9476
Implied Volatility Skew	0.0128
Option Statistics
Put-Call Ratio (Volume)	0.5578
Put-Call Ratio (Open Interest)	0.8546