New Delhi, Nov. 5 -- South Korea's Kospi, which has swung between waves of buying and selling amid the artificial intelligence (AI) frenzy, crashed on Thursday, November 5, tumbling 5.3% to settle at 5,383.80.

The sharp selling triggered a temporary suspension of program trading on the main exchange, while the tech-heavy Kosdaq also activated a sell-side sidecar around noon as the index dropped below the 700 mark.

The sell-off in key heavyweights, including Samsung Electronics and memory chipmaker SK Hynix, dragged the Kospi to its biggest single-day decline in three weeks, even as Wall Street closed sharply higher.

Semiconductor equipment and components manufacturers also came under pressure, with Hanmi Semiconductor and Samsung Elect...