Put-Call Ratio (Volume) (120-Day)

Put-Call Ratio (Volume): The ratio of puts traded to calls traded, for options with the relevant expiration date.

Alector, Inc. (ALEC) had 120-Day Put-Call Ratio (Volume) of 0.0000 for 2026-01-16.

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Figures for 2026-01-16

Volatility Metrics
Historical Volatility (Close-to-Close)	1.3740
Historical Volatility (Parkinson)	0.7890
Implied Volatility (Calls)	1.3799
Implied Volatility (Puts)	1.3569
Implied Volatility (Mean)	1.3684
Put-Call Implied Volatility Ratio	0.9833
Implied Volatility Skew	0.1764
Option Statistics
Put-Call Ratio (Volume)	0.0000
Put-Call Ratio (Open Interest)	0.0070