On June 23, United Microelectronics (UMC) fell 4.09% in regular trading, trading at $26.025/share, with turnover of $83.14 million. The decline was triggered by the company's refusal to confirm market rumors regarding a strategic collaboration with Intel on 3nm chip manufacturing.

On the news front, UMC issued a statement through the Taiwan Stock Exchange in response to widely circulated reports of a partnership with Intel to jointly develop 12nm and 3nm fabrication processes. The company stated it does not comment on speculative reports or market rumors, urging investors to rely solely on official disclosures. This non-confirmation cast doubt on the deal's certainty, undermining investor confidence that had built up during the stock's recent sharp rally driven by the Intel 3nm rumor and reports of UMC entering Qualcomm's supply chain.

The broader semiconductor sector experienced significant selling pressure, with Micron Technology down 11.67%, Marvell Technology down 9.15%, AMD down 6.97%, Intel down 5.93%, and NVIDIA down 3.12%, compounding profit-taking pressure on UMC after its prior surge.

(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.)