Historical Volatility (Parkinson) (120-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.

NOV Inc. (NOV) had 120-Day Historical Volatility (Parkinson) of 0.3315 for 2026-03-05.

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Figures for 2026-03-05

Volatility Metrics
Historical Volatility (Close-to-Close)	0.3903
Historical Volatility (Parkinson)	0.3315
Implied Volatility (Calls)	0.4237
Implied Volatility (Puts)	0.3956
Implied Volatility (Mean)	0.4096
Put-Call Implied Volatility Ratio	0.9337
Implied Volatility Skew	0.0556
Option Statistics
Put-Call Ratio (Volume)	12.5833
Put-Call Ratio (Open Interest)	0.1443