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.

SELLAS Life Sciences Group, Inc. (SLS) had 20-Day Put-Call Ratio (Volume) of 0.2735 for 2026-04-20.

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Figures for 2026-04-20

Volatility Metrics
Historical Volatility (Close-to-Close)	0.6989
Historical Volatility (Parkinson)	0.6329
Implied Volatility (Calls)	1.2594
Implied Volatility (Puts)	1.2612
Implied Volatility (Mean)	1.2603
Put-Call Implied Volatility Ratio	1.0014
Implied Volatility Skew	0.2736
Option Statistics
Put-Call Ratio (Volume)	0.2735
Put-Call Ratio (Open Interest)	0.1481