Put-Call Ratio (Volume) (30-Day)

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

United Microelectronics Corporation (UMC) had 30-Day Put-Call Ratio (Volume) of 0.2644 for 2026-04-21.

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Figures for 2026-04-21

Volatility Metrics
Historical Volatility (Close-to-Close)	0.6021
Historical Volatility (Parkinson)	0.2700
Implied Volatility (Calls)	0.6243
Implied Volatility (Puts)	0.6476
Implied Volatility (Mean)	0.6360
Put-Call Implied Volatility Ratio	1.0373
Implied Volatility Skew	-0.0106
Option Statistics
Put-Call Ratio (Volume)	0.2644
Put-Call Ratio (Open Interest)	0.0544