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.

Glaukos Corporation (GKOS) had 20-Day Put-Call Ratio (Open Interest) of 0.2813 for 2026-01-16.

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Figures for 2026-01-16

Volatility Metrics
Historical Volatility (Close-to-Close)	0.5444
Historical Volatility (Parkinson)	0.4865
Implied Volatility (Calls)	0.6283
Implied Volatility (Puts)	0.6224
Implied Volatility (Mean)	0.6253
Put-Call Implied Volatility Ratio	0.9907
Implied Volatility Skew	-0.0102
Option Statistics
Put-Call Ratio (Volume)	0.2857
Put-Call Ratio (Open Interest)	0.2813