Put-Call Ratio (Open Interest) (180-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 180-Day Put-Call Ratio (Open Interest) of 2.5993 for 2026-10-15.

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Figures for 2026-10-15

Volatility Metrics
Historical Volatility (Close-to-Close)	0.2613
Historical Volatility (Parkinson)	0.2198
Implied Volatility (Calls)	0.2860
Implied Volatility (Puts)	0.2819
Implied Volatility (Mean)	0.2839
Put-Call Implied Volatility Ratio	0.9857
Implied Volatility Skew	0.0311
Option Statistics
Put-Call Ratio (Volume)	0.5579
Put-Call Ratio (Open Interest)	2.5993