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Nasdaq 100 Futures Slide 3.1%, Kospi Plunges 10% — Global AI Selloff Hits SK Hynix and Samsung as Rate-Hike Fears Mount

Nasdaq 100 futures fell 3.1% in premarket trading Tuesday while South Korea's Kospi plunged nearly 10% — its worst session in years — as a global technology selloff intensified overnight. SK Hynix fell more than 12% and Samsung Electronics dropped sharply, triggering circuit breakers on South Korean exchanges. European markets followed, with ASML down 5% and the Euro Stoxx Technology index falling 3%. The selloff reflects mounting investor concern over Federal Reserve rate-hike signals and the cost of AI infrastructure debt.

South Korea's KOSPI Surges 5% to 5,925 as Samsung and SK Hynix Lead Record Institutional Buying Amid AI Memory Boom

South Korea's benchmark KOSPI index surged more than 5% on Wednesday, closing at 5,925.03 on record institutional net buying of 3.1 trillion won — the single largest institutional buy day in the exchange's history. Semiconductor giants Samsung Electronics and SK Hynix led the rally, reclaiming key psychological price levels at 200,000 won and 1 million won respectively, as investors positioned ahead of Micron Technology's blockbuster earnings expected after the U.S. close.