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.

Banco Santander, S.A. (SAN) had 20-Day Put-Call Ratio (Volume) of 0.0150 for 2026-05-21.

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Figures for 2026-05-21

Volatility Metrics
Historical Volatility (Close-to-Close)	0.3740
Historical Volatility (Parkinson)	0.2100
Implied Volatility (Calls)	0.3408
Implied Volatility (Puts)	0.3395
Implied Volatility (Mean)	0.3402
Put-Call Implied Volatility Ratio	0.9960
Implied Volatility Skew	-0.2716
Option Statistics
Put-Call Ratio (Volume)	0.0150
Put-Call Ratio (Open Interest)	0.2622