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.

Archer Aviation Inc. (ACHR) had 180-Day Put-Call Ratio (Open Interest) of 0.4296 for 2026-05-22.

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Figures for 2026-05-22

Volatility Metrics
Historical Volatility (Close-to-Close)	0.6127
Historical Volatility (Parkinson)	0.5780
Implied Volatility (Calls)	0.8081
Implied Volatility (Puts)	0.8808
Implied Volatility (Mean)	0.8445
Put-Call Implied Volatility Ratio	1.0899
Implied Volatility Skew	0.0026
Option Statistics
Put-Call Ratio (Volume)	0.5939
Put-Call Ratio (Open Interest)	0.4296