On July 28, United Microelectronics fell 11.69% in regular trading, trading at $17.07/share, with turnover of $73.24 million.

On the news front, global chip stocks suffered a massive selloff as concerns over whether AI demand has been artificially inflated intensified. South Korea's KOSPI index plunged as much as 9.6%, triggering a 20-minute trading halt. Memory chip giants Samsung Electronics and SK Hynix both dropped over 11%. NVIDIA's latest round of transactions exceeding $750 billion further fueled market anxiety about the sustainability of the AI boom, with systematic selling pressure spreading across the entire semiconductor supply chain.

Within the Semiconductors sector, peers also declined sharply: Micron Technology down 10.09%, Advanced Micro Devices down 8.62%, SK hynix down 8.4%, Intel down 7.07%, and NVIDIA down 1.66%. United Microelectronics had already accumulated a decline of over 18% prior to this session and briefly rebounded 6.01% on July 27 following Intel's better-than-expected earnings before resuming its downward trajectory. The company is scheduled to release quarterly earnings on July 29, with market consensus expecting revenue growth of 9.28% year-over-year.

(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.)