Bollcoin, October 21 — On Wednesday, as South Korea's KOSPI index surged sharply, the Korea Exchange triggered a "buy-side" program trading halt mechanism (Sidecar) for the benchmark index. According to the Korea Exchange, program trading for KOSPI-listed stocks was suspended at 10:51 a.m. local time for five minutes. After opening higher, the KOSPI index climbed 247.81 points by 11:02 a.m., a gain of 4.46%, to 5,800.55 points. The previous trading day, the index had plunged nearly 4% amid investor concerns over whether massive investments in AI infrastructure would yield corresponding profits.