Put-Call Ratio (Volume) (10-Day)

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

Prothena Corporation plc (PRTA) had 10-Day Put-Call Ratio (Volume) of 0.0000 for 2026-09-03.

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Figures for 2026-09-03

Volatility Metrics
Historical Volatility (Close-to-Close)	0.2788
Historical Volatility (Parkinson)	0.3645
Implied Volatility (Calls)	0.5745
Implied Volatility (Puts)	0.4678
Implied Volatility (Mean)	0.5212
Put-Call Implied Volatility Ratio	0.8143
Implied Volatility Skew	--
Option Statistics
Put-Call Ratio (Volume)	0.0000
Put-Call Ratio (Open Interest)	0.5080