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.

PDF Solutions, Inc. (PDFS) had 180-Day Put-Call Ratio (Open Interest) of 0.0056 for 2026-06-04.

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Figures for 2026-06-04

Volatility Metrics
Historical Volatility (Close-to-Close)	0.5977
Historical Volatility (Parkinson)	0.5521
Implied Volatility (Calls)	0.7665
Implied Volatility (Puts)	0.7313
Implied Volatility (Mean)	0.7489
Put-Call Implied Volatility Ratio	0.9541
Implied Volatility Skew	0.0344
Option Statistics
Put-Call Ratio (Volume)	0.0000
Put-Call Ratio (Open Interest)	0.0056