A five-minute KOSPI program trading suspension halted bid-side basket orders on June 25, 2026, after a chip-led rally pushed South Korea’s benchmark index up more than 5% at the open.
The Korea Exchange imposed a five-minute buy-side program trading suspension on the KOSPI on June 25, 2026, after South Korea’s benchmark stock index rose more than 5% at the open during a chip-led rally. The curb temporarily halted bid-side basket-based automated orders to slow trading during a rapid move. An older report described a sell-side sidecar after a drop of more than 5%, but the newer account indicates the event was a buy-side curb tied to a sharp gain.