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Large Decrease in Open Interest

UMC United Microelectronics (New)19.45+0.51 (+2.7%)

The open interest (OI) on the 21-Aug-26 27.00 strike decreased by 21,489 call contracts and was unchanged for puts. The total OI for the expiration was decreased by 3x the average option volume. View Open Interest
Large Increase in Open Interest

UMC United Microelectronics (New)19.45+0.51 (+2.7%)

The open interest (OI) on the 18-Sep-26 20.00 strike increased by 22,770 call contracts and 63 puts. The total OI for the expiration was increased by 3x the average option volume. View Open Interest
Unusual Option Volume

UMC United Microelectronics (New)19.05+0.26 (+1.4%)

United Microelectronics (New) trades 91,618 contracts. UMC will report earnings on Oct 28, 2026.
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$UMC Earnings July 29 BMO. 21-Aug-26 Straddle Implies ±20.2% Move vs Prev. Move +9.3%
Large Increase in Open Interest

UMC United Microelectronics (New)21.03-1.26 (-5.7%)

The open interest (OI) on the 21-Aug-26 24.00 strike increased by 22,011 call contracts and 3 puts. The total OI for the expiration was increased by 3x the average option volume. View Open Interest
$UMC United Microelectronics (New) Option Order Flow Sentiment is 92.8% Bearish.
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