On June 26, UMC fell 5.41% in pre-market trading, trading at $26.0165/share, with turnover of $597,500.

On the news front, the semiconductor sector weakened broadly, with Micron Technology down 4.81%, Marvell Technology down 3.79%, and Intel down 3.51%, dragging overall sector sentiment. UMC had previously surged on multiple catalysts including rumors of a partnership with Intel to co-develop 3nm and 12nm process technologies at Intel's Arizona facility, as well as expectations of customer order redirections following TSMC's reported 25% reduction in 28nm capacity. However, UMC filed a statement on the Taiwan Stock Exchange indicating it would not comment on speculative reports or market rumors, reaffirming that investors should rely solely on official disclosures. Market uncertainty over whether the cooperation will materialize has intensified selling pressure, with accumulated gains from the prior rally now being unwound as profit-taking concentrates in pre-market trading.

(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.)