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.

Annexon, Inc. (ANNX) had 20-Day Put-Call Ratio (Open Interest) of 0.1321 for 2026-01-16.

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Figures for 2026-01-16

Volatility Metrics
Historical Volatility (Close-to-Close)	0.9947
Historical Volatility (Parkinson)	0.8434
Implied Volatility (Calls)	1.2424
Implied Volatility (Puts)	1.0009
Implied Volatility (Mean)	1.1217
Put-Call Implied Volatility Ratio	0.8056
Implied Volatility Skew	0.1883
Option Statistics
Put-Call Ratio (Volume)	0.0000
Put-Call Ratio (Open Interest)	0.1321