On June 29, ASE Technology declined 3.01% overnight, trading at $39.0/share, with turnover of $182,500. The decline was driven by continued weakness across the semiconductor sector combined with concerns over the parent company's capital position following a subsidiary stake reduction announcement.

On June 28, ASE Technology's indirect controlling shareholder, ASE Investment Holdings, announced plans to reduce its stake in subsidiary Universal Scientific Industrial by up to 2% (approximately 47.78 million shares) via block trades through Hua Cheng Technology, citing its own funding needs. The reduction is scheduled between July 21 and October 20. The explicit reference to funding needs triggered market concerns over the group's financial health, placing short-term sentiment pressure on the stock.

Meanwhile, the broader semiconductor sector extended its prior downtrend, with Micron Technology falling 0.85%, Intel down 1.42%, and Advanced Micro Devices declining 0.77%, adding sector-wide headwinds to ASE Technology's price action.

(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.)