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.

United Microelectronics Corporation (UMC) had 120-Day Put-Call Ratio (Open Interest) of 1.3773 for 2026-10-20.

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Figures for 2026-10-20

Volatility Metrics
Historical Volatility (Close-to-Close)	0.6698
Historical Volatility (Parkinson)	0.4015
Implied Volatility (Calls)	0.5543
Implied Volatility (Puts)	0.5702
Implied Volatility (Mean)	0.5623
Put-Call Implied Volatility Ratio	1.0287
Implied Volatility Skew	0.0118
Option Statistics
Put-Call Ratio (Volume)	0.3000
Put-Call Ratio (Open Interest)	1.3773