Put-Call Ratio (Open Interest) (150-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 150-Day Put-Call Ratio (Open Interest) of 0.1051 for 2026-01-20.

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Figures for 2026-01-20

Volatility Metrics
Historical Volatility (Close-to-Close)	0.3157
Historical Volatility (Parkinson)	0.2569
Implied Volatility (Calls)	0.3390
Implied Volatility (Puts)	0.3823
Implied Volatility (Mean)	0.3607
Put-Call Implied Volatility Ratio	1.1278
Implied Volatility Skew	-0.0240
Option Statistics
Put-Call Ratio (Volume)	0.0584
Put-Call Ratio (Open Interest)	0.1051