The 60-day correlation between the Kospi and Nasdaq 100 recently climbed to about 0.50, its highest level since 2021, according to data from Rayliant. Samsung Electronics and SK Hynix, which together account for more than half of the Kospi index, sit at the center of the AI hardware supply chain, providing the memory chips needed for data centers operated by U.S. technology giants. Data-center demand rose from around 40% of global DRAM demand last year to more than half this year. On July 13, the Kospi fell more than 8%, dragged by SK Hynix’s 15% plunge, before the Nasdaq 100 followed with a 1.88% decline.
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