A SK Hynix flag (R) and a South Korean national flag (L) flutter outside the company's Bundang office in Seongnam on Jan. 26, 2024. Jung Yeon-je | Afp | Getty ImagesSK Hynix beat rival Samsung Electronics in operating profit for the first time in 2025, as it retained its lead in high-bandwidth memory used in artificial intelligence chips. The two South Korean memory makers went head-to-head this week, with SK Hynix reporting earnings on Wednesday and Samsung on Thursday morning local time.SK Hyn...