Put-Call Ratio (Volume) (30-Day)

Put-Call Ratio (Volume): The ratio of puts traded to calls traded, for options with the relevant expiration date.

Twist Bioscience Corporation (TWST) had 30-Day Put-Call Ratio (Volume) of 0.7794 for 2026-04-20.

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Figures for 2026-04-20

Volatility Metrics
Historical Volatility (Close-to-Close)	0.7722
Historical Volatility (Parkinson)	0.6401
Implied Volatility (Calls)	0.8694
Implied Volatility (Puts)	0.9399
Implied Volatility (Mean)	0.9046
Put-Call Implied Volatility Ratio	1.0811
Implied Volatility Skew	0.0085
Option Statistics
Put-Call Ratio (Volume)	0.7794
Put-Call Ratio (Open Interest)	0.3470