SEOUL, May 27 : SK Hynix topped $1 trillion in market value for the first time on Wednesday, joining its memory chip rivals Samsung Electronics and Micron Technology in reaching the milestone on an AI-driven rally. Shares of SK Hynix jumped as much as 14.9 per cent, taking the South Korean chipmaker's market value to a record 1,680 trillion won ($1.12 trillion) and propelling the country's benchmark KOSPI index to a record high. Domestic rival Samsung surpassed $1 trillion in market value for