On August 19, Amkor Technology fell 5.65% in regular trading, trading at $51.69/share, with turnover of $53.41 million.

On the news front, surging long-term U.S. Treasury yields weighed heavily on high-growth technology stock valuations, with the Philadelphia Semiconductor Index plunging nearly 5%. Funds rotated out of AI momentum stocks into defensive assets, putting broad pressure on the semiconductor equipment sector. Within the sector, AXT Inc fell 10.22%, Lam Research fell 3.8%, Applied Materials fell 3.68%, KLA Corporation fell 3.02%, and ASML fell 1.77%, amplifying sector-wide selling.

Adding to the pressure, the company had previously issued third-quarter revenue guidance below Wall Street expectations. The combination of soft near-term guidance and macro liquidity headwinds further intensified downward pressure on the stock, which has now declined significantly from its August 17 session high of $62.16.

(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.)