Chipmakers SK Hynix and Micron join $1tn club on surging AI demand BBCSK Hynix hits $1 trillion valuation as AI boom lifts South Korean chip stocks CNBCSK Hynix joins Micron in $1 trillion club as AI memory chip rally accelerates Yahoo FinanceSouth Korea's KOSPI hits record as SK Hynix joins $1 trillion club after Samsung, Micron Reuters