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 0.9474 for 2026-09-04.

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Figures for 2026-09-04

Volatility Metrics
Historical Volatility (Close-to-Close)	0.8631
Historical Volatility (Parkinson)	0.7401
Implied Volatility (Calls)	0.7462
Implied Volatility (Puts)	0.7403
Implied Volatility (Mean)	0.7433
Put-Call Implied Volatility Ratio	0.9921
Implied Volatility Skew	-0.0014
Option Statistics
Put-Call Ratio (Volume)	0.9474
Put-Call Ratio (Open Interest)	0.7843