· Weekly signal · UMC

United Microelectronics (UMC) drops 8.3% in latest weekly reading

The pullback puts fresh pressure on a semiconductor foundry stock that still shows a strong 12-week gain.

Weekly market chart context for United Microelectronics shares and semiconductor wafer manufacturing.

United Microelectronics (UMC) ended the latest week at $19.48, extending its four-week decline to 22.6% in weekly market data. The move marks a sharp setback for the Taiwan-based semiconductor foundry after a still-positive medium-term run.

The chart shows a weekly price path over 52 weeks, not intraday action. The evidence is mixed: the trend signal remains active, Relative Strength is 61.8 and Market Dynamics still offers confirmation, while weekly volume ran below its recent norm.