Put-Call Ratio (Open Interest) (120-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.

STAAR Surgical Company (STAA) had 120-Day Put-Call Ratio (Open Interest) of 0.3405 for 2026-04-16.

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Figures for 2026-04-16

Volatility Metrics
Historical Volatility (Close-to-Close)	0.6217
Historical Volatility (Parkinson)	0.5453
Implied Volatility (Calls)	0.5543
Implied Volatility (Puts)	0.5058
Implied Volatility (Mean)	0.5300
Put-Call Implied Volatility Ratio	0.9125
Implied Volatility Skew	0.0233
Option Statistics
Put-Call Ratio (Volume)	0.0000
Put-Call Ratio (Open Interest)	0.3405