Historical Volatility (Parkinson) (60-Day)

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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.

BIO-key International Inc. (BKYI) had 60-Day Historical Volatility (Parkinson) of 1.0008 for 2025-06-24.

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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 2025-06-24

Volatility Metrics
Historical Volatility (Close-to-Close)	0.5852
Historical Volatility (Parkinson)	1.0008
Implied Volatility (Calls)	--
Implied Volatility (Puts)	--
Implied Volatility (Mean)	--
Put-Call Implied Volatility Ratio	--
Implied Volatility Skew	--
Option Statistics
Put-Call Ratio (Volume)	--
Put-Call Ratio (Open Interest)	--

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1	2	3	4	5	6	7
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29	30