Put-Call Ratio (Open Interest) (30-Day)

Put-Call Ratio (Open Interest): The ratio of outstanding put contracts to outstanding call contracts at the close of the trading day, for options with the relevant expiration date.

TransAlta Corporation (TAC) had 30-Day Put-Call Ratio (Open Interest) of 0.6795 for 2025-08-08.

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Figures for 2025-08-08

Volatility Metrics
Historical Volatility (Close-to-Close)	0.3176
Historical Volatility (Parkinson)	0.3452
Implied Volatility (Calls)	0.4659
Implied Volatility (Puts)	--
Implied Volatility (Mean)	--
Put-Call Implied Volatility Ratio	--
Implied Volatility Skew	--
Option Statistics
Put-Call Ratio (Volume)	--
Put-Call Ratio (Open Interest)	0.6795