(Image credit: Getty / Bloomberg) SK hynix overtook Samsung Electronics on Monday to become South Korea's most valuable listed company, the first time Samsung has surrendered the top spot on the KOSPI index since November 2000, according to Reuters . SK hynix shares closed up 5.6% to lift its market capitalization to 2,080.4 trillion won ($1.35 trillion), edging past Samsung's 2,066.7 trillion won excluding preferred shares, after a rally of more than 340% this year built almost entirely on demand for the high-bandwidth memory it supplies to Nvidia and other AI chip buyers. The company held 61% of the global HBM market in 2025, against 17% for Samsung and 21% for Micron. Go deeper with TH Premium: Memory SK hynix is one of the few pure-play memory makers, while Samsung spans smartphones, displays, contract chipmaking, and home appliances, among many other markets.…