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.

VinFast Auto Ltd. (VFS) had 20-Day Put-Call Ratio (Volume) of 1.1111 for 2026-05-22.

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Figures for 2026-05-22

Volatility Metrics
Historical Volatility (Close-to-Close)	0.3335
Historical Volatility (Parkinson)	0.3931
Implied Volatility (Calls)	0.9219
Implied Volatility (Puts)	0.8585
Implied Volatility (Mean)	0.8902
Put-Call Implied Volatility Ratio	0.9312
Implied Volatility Skew	0.0653
Option Statistics
Put-Call Ratio (Volume)	1.1111
Put-Call Ratio (Open Interest)	0.5523