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 1.3720 for 2025-09-26.

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Figures for 2025-09-26

Volatility Metrics
Historical Volatility (Close-to-Close)	0.3012
Historical Volatility (Parkinson)	0.2410
Implied Volatility (Calls)	0.2474
Implied Volatility (Puts)	0.2336
Implied Volatility (Mean)	0.2405
Put-Call Implied Volatility Ratio	0.9441
Implied Volatility Skew	0.0408
Option Statistics
Put-Call Ratio (Volume)	0.2934
Put-Call Ratio (Open Interest)	1.3720