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.

Siga Technologies Inc. (SIGA) had 120-Day Put-Call Ratio (Open Interest) of 0.0953 for 2026-05-22.

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Figures for 2026-05-22

Volatility Metrics
Historical Volatility (Close-to-Close)	0.4195
Historical Volatility (Parkinson)	0.4107
Implied Volatility (Calls)	1.2664
Implied Volatility (Puts)	0.6672
Implied Volatility (Mean)	0.9668
Put-Call Implied Volatility Ratio	0.5269
Implied Volatility Skew	0.2865
Option Statistics
Put-Call Ratio (Volume)	0.0000
Put-Call Ratio (Open Interest)	0.0953