Historical Volatility (Parkinson) (60-Day)

Historical Volatility (Parkinson): The past volatility of the security over the selected time frame, calculated using the high and low prices on each trading day.

BlackRock (BLK) had 60-Day Historical Volatility (Parkinson) of 0.1630 for 2025-09-26.

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Over 300 data fields encompassing historical volatility, implied volatility, and put-call ratios for multiple time frames
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Figures for 2025-09-26

Volatility Metrics
Historical Volatility (Close-to-Close)	0.1711
Historical Volatility (Parkinson)	0.1630
Implied Volatility (Calls)	0.2401
Implied Volatility (Puts)	0.2381
Implied Volatility (Mean)	0.2391
Put-Call Implied Volatility Ratio	0.9917
Implied Volatility Skew	0.0421
Option Statistics
Put-Call Ratio (Volume)	0.5004
Put-Call Ratio (Open Interest)	4.9952