Historical Volatility (Parkinson) (150-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 150-Day Historical Volatility (Parkinson) of 0.3311 for 2026-03-05.

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Figures for 2026-03-05

Volatility Metrics
Historical Volatility (Close-to-Close)	0.4112
Historical Volatility (Parkinson)	0.3311
Implied Volatility (Calls)	0.3938
Implied Volatility (Puts)	0.3511
Implied Volatility (Mean)	0.3725
Put-Call Implied Volatility Ratio	0.8915
Implied Volatility Skew	0.0569
Option Statistics
Put-Call Ratio (Volume)	14.4711
Put-Call Ratio (Open Interest)	0.1281