On July 31, SK hynix rose 4.03% overnight, trading at $157.21/share, with turnover of $7.78 million, extending the prior session's broad memory sector rally.

On the news front, SK Group Chairman Choi Tae-won purchased 3,620 shares of SK hynix on the open market for approximately 4.8 billion Korean won (about $3.34 million), marking his first direct personal stake in the company. Previously, Choi had only controlled the chipmaker indirectly through SK Square. The stock had retreated over 50% from its June high, and the chairman's move to buy at these levels was widely interpreted as a bottom-fishing signal, further boosting investor confidence.

Meanwhile, the broader memory chip sector continued its strong rebound, with peers including Micron Technology, SanDisk, Seagate, and Western Digital all posting significant gains in the prior regular session. The sector-wide bounce followed a period of intense selling pressure that had driven the Philadelphia Semiconductor Index down nearly 19% in July.

(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.)