Put-Call Ratio (Open Interest) (120-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.

Canadian National Railway Company (CNI) had 120-Day Put-Call Ratio (Open Interest) of 0.5363 for 2025-08-01.

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Figures for 2025-08-01

Volatility Metrics
Historical Volatility (Close-to-Close)	0.2627
Historical Volatility (Parkinson)	0.2209
Implied Volatility (Calls)	0.2387
Implied Volatility (Puts)	0.2142
Implied Volatility (Mean)	0.2264
Put-Call Implied Volatility Ratio	0.8973
Implied Volatility Skew	0.0580
Option Statistics
Put-Call Ratio (Volume)	0.5000
Put-Call Ratio (Open Interest)	0.5363