On June 2, UMC fell 3.1% overnight, trading at $22.18/share, with trading volume of $6.36 million. The decline came amid broad weakness across the semiconductor sector, with the stock pulling back after a significant rally driven by strong Q1 results.

The semiconductor sector saw widespread selling pressure, with Micron Technology down 1.84%, NVIDIA down 0.89%, AMD down 2.04%, and Intel down 1.79%, while Broadcom bucked the trend with a 3.01% gain. UMC had previously surged over 10% following its Q1 earnings release, which showed net profit soaring 108% year-over-year to NT$16.17 billion, with revenue of NT$61.04 billion. The company also announced selective wafer price hikes for the second half and a 12nm FinFET collaboration with Intel set for mass production in 2027.

However, the stock's TTM price-to-earnings ratio has risen to 36.7x, significantly above its five-year median of 11.8x, suggesting the prior rally had already priced in much of the positive outlook. The overnight retreat appears consistent with profit-taking amid stretched valuations and sector-wide headwinds.

(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.)