Put-Call Ratio (Open Interest) (90-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 90-Day Put-Call Ratio (Open Interest) of 0.7295 for 2026-10-15.

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Figures for 2026-10-15

Volatility Metrics
Historical Volatility (Close-to-Close)	0.2402
Historical Volatility (Parkinson)	0.2114
Implied Volatility (Calls)	0.2804
Implied Volatility (Puts)	0.2758
Implied Volatility (Mean)	0.2781
Put-Call Implied Volatility Ratio	0.9836
Implied Volatility Skew	0.0365
Option Statistics
Put-Call Ratio (Volume)	1.1231
Put-Call Ratio (Open Interest)	0.7295