Put-Call Ratio (Open Interest) (180-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 180-Day Put-Call Ratio (Open Interest) of 0.1812 for 2026-10-16.

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Figures for 2026-10-16

Volatility Metrics
Historical Volatility (Close-to-Close)	0.3203
Historical Volatility (Parkinson)	0.2376
Implied Volatility (Calls)	0.4015
Implied Volatility (Puts)	0.3144
Implied Volatility (Mean)	0.3579
Put-Call Implied Volatility Ratio	0.7831
Implied Volatility Skew	0.0768
Option Statistics
Put-Call Ratio (Volume)	0.0000
Put-Call Ratio (Open Interest)	0.1812