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.

Onto Innovation Inc. (ONTO) had 180-Day Put-Call Ratio (Open Interest) of 1.1201 for 2026-09-04.

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Figures for 2026-09-04

Volatility Metrics
Historical Volatility (Close-to-Close)	0.8262
Historical Volatility (Parkinson)	0.5998
Implied Volatility (Calls)	0.6998
Implied Volatility (Puts)	0.6970
Implied Volatility (Mean)	0.6984
Put-Call Implied Volatility Ratio	0.9960
Implied Volatility Skew	0.0059
Option Statistics
Put-Call Ratio (Volume)	0.5820
Put-Call Ratio (Open Interest)	1.1201