On July 17, United Microelectronics fell 5.02% in pre-market trading, trading at $21.03/share, with turnover of $472,600.

On the news front, the semiconductor sector continues to face systematic selling pressure. Within the sector, Micron Technology fell 4.42%, Intel fell 3.80%, Advanced Micro Devices fell 3.87%, Taiwan Semiconductor Manufacturing fell 3.55%, and NVIDIA fell 2.74%. UMC extended its decline after already dropping over 7% in the prior trading session, when it fully reversed gains made on July 15.

UMC had surged over 7% on July 15 following the announcement that its Singapore fab delivered its first batch of mass-produced silicon photonics wafers in collaboration with Silith Technology, targeting next-generation AI infrastructure connectivity. Citigroup also expressed an optimistic outlook for UMC's second half. However, persistent sector-wide weakness has erased those gains entirely.

On the fundamental side, UMC's Q2 revenue grew nearly 17% year-over-year, marking a 15-quarter high. The next earnings report is scheduled for July 29.

(The above content is based on publicly available market information, generated by a program or algorithm, and is intended solely as a stock movement alert. It does not constitute investment advice or a basis for trading decisions.)