🔴 United Microelectronics is trading 6.04% down today as Treasury yields reached multi-year highs

United Microelectronics is trading 6.04% down at $18.25 as semiconductor shares face heavy selling amid elevated Treasury yields and Middle East tensions.

• The Philadelphia Semiconductor Index was down 3.7% in trading, while broader technology stocks also weakened; Middle East tensions lifted oil prices.
• No clear company-specific catalyst emerged on August 18, 2026.
• Increased 2026 capital spending and expansion plans remain constructive, suggesting the move does not appear tied to deteriorating fundamentals.