On the 3rd, as the KOSPI index opened with a plunge in the 2% range due to the war between the United States and Iran, various indexes are displayed on the status board at Hana Bank's dealing room in Jung-gu, Seoul. Reporter Lee Jun-heon

With KOSPI 200 futures plunging more than 5%, a sell sidecar (a temporary suspension of program-trading sell quotes) was triggered on the stock market. It is the first sell sidecar on the KOSPI in about a month since the 6th of last month.

The Korea Exchange announced that at 12:05 p.m. today a sell sidecar was triggered on the stock market. A sell sidecar halts program selling for five minutes to ease volatility. It is triggered when a state in which KOSPI 200 futures have fallen by 5% or more from the previous session persists for one minute. At that time, KOSPI 200 futures were down 5.09% from the previous close at 890.05.

The KOSPI index is deepening its intraday decline, tumbling close to 5%. As of 12:11 p.m., the KOSPI was trading at 5,945.62, down 298.51 points (4.78%). Individuals were net buyers of nearly 3.9 trillion won, but foreigners dumped more than 3.8 trillion won.

Samsung Electronics and SK hynix plunged more than 6%, while Hyundai Motor and Kia sank more than 9%, as selling concentrated on large caps that had surged, dragging the index lower.