Put-Call Ratio (Open Interest) (120-Day)

Put-Call Ratio (Open Interest): The ratio of outstanding put contracts to outstanding call contracts at the close of the trading day, for options with the relevant expiration date.

ARK Space & Defense Innovation ETF (ARKX) had 120-Day Put-Call Ratio (Open Interest) of 0.5904 for 2026-07-20.

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Figures for 2026-07-20

Volatility Metrics
Historical Volatility (Close-to-Close)	0.3753
Historical Volatility (Parkinson)	0.2675
Implied Volatility (Calls)	0.4162
Implied Volatility (Puts)	0.4040
Implied Volatility (Mean)	0.4101
Put-Call Implied Volatility Ratio	0.9708
Implied Volatility Skew	0.0340
Option Statistics
Put-Call Ratio (Volume)	2.9987
Put-Call Ratio (Open Interest)	0.5904