Put-Call Ratio (Volume) (180-Day)

Put-Call Ratio (Volume): The ratio of puts traded to calls traded, for options with the relevant expiration date.

Axcelis Technologies, Inc. (ACLS) had 180-Day Put-Call Ratio (Volume) of 0.0317 for 2026-05-22.

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Figures for 2026-05-22

Volatility Metrics
Historical Volatility (Close-to-Close)	0.6450
Historical Volatility (Parkinson)	0.5059
Implied Volatility (Calls)	0.6911
Implied Volatility (Puts)	0.7007
Implied Volatility (Mean)	0.6959
Put-Call Implied Volatility Ratio	1.0139
Implied Volatility Skew	0.0026
Option Statistics
Put-Call Ratio (Volume)	0.0317
Put-Call Ratio (Open Interest)	0.1915