On July 1, UMC fell 3.12% overnight, trading at $26.36/share, with turnover of $296,500. The decline came amid broad-based weakness across the semiconductor sector, with Micron Technology down 1.37%, NVIDIA down 0.73%, Intel down 0.76%, AMD down 0.43%, and Marvell Technology down 1.68%.

The pullback follows a strong session on June 30 when UMC surged as much as 5% on news that nearly 20 analog and power semiconductor companies were set to initiate a new round of price increases starting July 1, driven by wafer foundry and raw material cost pass-through combined with surging AI data center power chip demand. UMC, as a major global wafer foundry, was seen as a direct beneficiary of the pricing upcycle.

However, following the recent sharp rally fueled by Intel collaboration rumors on 3nm and 12nm process development and TSMC 28nm capacity reallocation expectations, profit-taking pressure has intensified. UMC previously stated it does not comment on speculative reports, leaving uncertainty around cooperation specifics.

(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.)