Put-Call Ratio (Volume) (90-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 90-Day Put-Call Ratio (Volume) of 0.6036 for 2026-10-19.

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Figures for 2026-10-19

Volatility Metrics
Historical Volatility (Close-to-Close)	0.9932
Historical Volatility (Parkinson)	0.8378
Implied Volatility (Calls)	0.8779
Implied Volatility (Puts)	0.8404
Implied Volatility (Mean)	0.8592
Put-Call Implied Volatility Ratio	0.9574
Implied Volatility Skew	0.0041
Option Statistics
Put-Call Ratio (Volume)	0.6036
Put-Call Ratio (Open Interest)	0.2517