Put-Call Ratio (Volume) (30-Day)

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

Onto Innovation Inc. (ONTO) had 30-Day Put-Call Ratio (Volume) of 0.5611 for 2026-09-04.

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Figures for 2026-09-04

Volatility Metrics
Historical Volatility (Close-to-Close)	0.8918
Historical Volatility (Parkinson)	0.5382
Implied Volatility (Calls)	0.6468
Implied Volatility (Puts)	0.6317
Implied Volatility (Mean)	0.6392
Put-Call Implied Volatility Ratio	0.9767
Implied Volatility Skew	0.0200
Option Statistics
Put-Call Ratio (Volume)	0.5611
Put-Call Ratio (Open Interest)	0.4576