On June 23, ASE Technology fell 3.14% in pre-market trading, trading at $40.65/share, with turnover of approximately $584,100. The decline came amid a broad semiconductor sector selloff, with major peers posting significant losses.

On the news front, the entire semiconductor sector faced heavy selling pressure following a sustained rally that had pushed many chip stocks to record highs. ASE Technology had surged over 150% year-to-date, driven by strong AI-related advanced packaging demand and a 29% year-over-year revenue increase in May. However, institutional investors in Taiwan have recently been aggressively reducing positions, with cumulative selling of approximately NT$4.59 billion in mid-June. Additionally, company insiders sold approximately $349.3 million worth of shares over the preceding three months with zero insider purchases, signaling caution at elevated valuations. The stock's forward P/E of approximately 33x, while below industry average, represents a significant premium to its five-year historical median of 19.2x.

Within the Semiconductors sector, individual stocks declined broadly: Micron Technology down 8.2%, Intel down 7.55%, Marvell Technology down 7.44%, Advanced Micro Devices down 5.73%, NVIDIA down 3.02%.

(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.)