Put-Call Ratio (Volume) (20-Day)

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

Ionis Pharmaceuticals, Inc. (IONS) had 20-Day Put-Call Ratio (Volume) of 0.0283 for 2026-07-20.

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Figures for 2026-07-20

Volatility Metrics
Historical Volatility (Close-to-Close)	1.2738
Historical Volatility (Parkinson)	0.4636
Implied Volatility (Calls)	0.6159
Implied Volatility (Puts)	0.5800
Implied Volatility (Mean)	0.5979
Put-Call Implied Volatility Ratio	0.9417
Implied Volatility Skew	0.1295
Option Statistics
Put-Call Ratio (Volume)	0.0283
Put-Call Ratio (Open Interest)	0.3620