Historical Volatility (Parkinson) (30-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.

ProShares Short S&P500 (SH) had 30-Day Historical Volatility (Parkinson) of 0.0940 for 2025-06-23.

For much more extensive volatility insights, check out our new product VolVue:

Over 300 data fields encompassing historical volatility, implied volatility, and put-call ratios for multiple time frames
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Figures for 2025-06-23

Volatility Metrics
Historical Volatility (Close-to-Close)	0.1213
Historical Volatility (Parkinson)	0.0940
Implied Volatility (Calls)	0.1735
Implied Volatility (Puts)	--
Implied Volatility (Mean)	--
Put-Call Implied Volatility Ratio	--
Implied Volatility Skew	--
Option Statistics
Put-Call Ratio (Volume)	1.5125
Put-Call Ratio (Open Interest)	1.6412