Put-Call Ratio (Volume) (20-Day)

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

STMicroelectronics N.V. (STM) had 20-Day Put-Call Ratio (Volume) of 0.7895 for 2026-07-20.

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Figures for 2026-07-20

Volatility Metrics
Historical Volatility (Close-to-Close)	0.6247
Historical Volatility (Parkinson)	0.4893
Implied Volatility (Calls)	0.9866
Implied Volatility (Puts)	0.9868
Implied Volatility (Mean)	0.9867
Put-Call Implied Volatility Ratio	1.0002
Implied Volatility Skew	0.0585
Option Statistics
Put-Call Ratio (Volume)	0.7895
Put-Call Ratio (Open Interest)	0.4371