Put-Call Ratio (Open Interest) (20-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.

WD-40 Company (WDFC) had 20-Day Put-Call Ratio (Open Interest) of 0.5857 for 2026-10-19.

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Figures for 2026-10-19

Volatility Metrics
Historical Volatility (Close-to-Close)	0.1486
Historical Volatility (Parkinson)	0.2045
Implied Volatility (Calls)	0.4195
Implied Volatility (Puts)	0.4423
Implied Volatility (Mean)	0.4309
Put-Call Implied Volatility Ratio	1.0544
Implied Volatility Skew	0.0357
Option Statistics
Put-Call Ratio (Volume)	0.5385
Put-Call Ratio (Open Interest)	0.5857