On July 2, United Microelectronics (UMC) fell 3.15% in pre-market trading, trading at $25.07/share, with turnover of $271,100.

The decline was driven by a sweeping sell-off across the semiconductor sector after reports that Meta is planning to launch a cloud infrastructure business to sell surplus AI computing power to external clients. The news triggered concerns over a potential peak in AI capital expenditure, sending the Philadelphia Semiconductor Index down over 6%. Micron Technology and SanDisk fell over 10%, Intel dropped over 9%, and TSMC declined nearly 7%, with systemic selling pressure spreading across the entire chip sector.

UMC had previously surged on rumors of a collaboration with Intel to co-develop 3nm and 12nm process technologies, as well as expectations around a global semiconductor price hike cycle. However, the company has publicly stated it does not comment on speculative reports or market rumors. Profit-taking pressure from prior gains, combined with the broad industry weakness, continues to weigh on the stock.

(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.)