SK hynix shares rallied as investors reacted to the company's decision to abandon plans for a U.S. initial public offering of its Solidigm flash-memory unit. Although the stock initially faced volatility following the announcement late on October 22, sentiment shifted positively during the session as the market digested the move. This company-specific development was further supported by a broader rebound in the semiconductor sector, which helped lift investor confidence following a recent period of industry-wide selling pressure.