United Microelectronics is trading at $18.10, down 4.89%, after third-quarter earnings and revenue missed analyst expectations. - On October 29, the reported shortfall was identified as a reason for the initial cautious reaction, despite higher utilization and sequential revenue growth. - Semiconductor weakness and broader technology-market pressure may also be adding to the decline; technology shares fell after disappointing reports from Alphabet and Samsung. - The Nasdaq was down 1.35%.