SMHX is trading 2.07% down at $55.20 after-hours, with no SMHX-specific catalyst identified. - It closed at $56.37 on October 28. The Nasdaq Composite fell 2.14%, while the S&P 500 and Dow rose, suggesting a mixed market. - Earlier, Reuters reported SK Hynix’s record quarterly operating profit and AI-infrastructure-driven memory demand, which lifted semiconductor shares in pre-market trading. That news does not clearly explain SMHX’s after-hours decline.