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.

STMicroelectronics N.V. (STM) had 30-Day Put-Call Ratio (Open Interest) of 0.6527 for 2026-09-01.

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Figures for 2026-09-01

Volatility Metrics
Historical Volatility (Close-to-Close)	0.4453
Historical Volatility (Parkinson)	0.2933
Implied Volatility (Calls)	0.4865
Implied Volatility (Puts)	0.4887
Implied Volatility (Mean)	0.4876
Put-Call Implied Volatility Ratio	1.0045
Implied Volatility Skew	0.0334
Option Statistics
Put-Call Ratio (Volume)	2.6964
Put-Call Ratio (Open Interest)	0.6527