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.

Grayscale Bitcoin Trust ETF (GBTC) had 20-Day Put-Call Ratio (Volume) of 0.0219 for 2026-08-21.

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Figures for 2026-08-21

Volatility Metrics
Historical Volatility (Close-to-Close)	0.4008
Historical Volatility (Parkinson)	0.2431
Implied Volatility (Calls)	0.4421
Implied Volatility (Puts)	0.4255
Implied Volatility (Mean)	0.4338
Put-Call Implied Volatility Ratio	0.9626
Implied Volatility Skew	-0.0068
Option Statistics
Put-Call Ratio (Volume)	0.0219
Put-Call Ratio (Open Interest)	0.2490