As the KOSPI index plunged more than 8% on the 8th, a circuit breaker was triggered on the stock market. Because of the circuit breaker, all KOSPI trading was halted for 20 minutes.

The Korea Exchange announced that, as of 9:03:42 a.m. that day, a circuit breaker had been triggered on the stock market.

A circuit breaker is a measure that halts stock market trading for 20 minutes if the KOSPI remains down 8% or more from the previous session closing level for one minute. After it is lifted, orders are collected for 10 minutes and matched at a single price.

At the time the circuit breaker was triggered, the KOSPI was down 683.13 points (8.37%) from the previous close at 7,477.46.

Samsung Electronics is trading at 298,500 won, down 9.27% from the previous close, and SK Hynix at 1,904,000 won, down 8.02%.

In the stock market, foreign investors are net sellers of 342.1 billion won, dragging the index lower. By contrast, individual investors and institutions are net buyers of 207.1 billion won and 142.1 billion won, respectively.

Later, at 9:34:45 a.m. the same day, a temporary suspension of program sell orders (sell sidecar) was triggered on the stock market. The sell sidecar is a mechanism that pauses program selling for five minutes to reduce volatility. It is triggered when KOSPI 200 futures remain down 5% for one minute.

A sell sidecar was also triggered on the KOSDAQ market at 9:06:02 a.m. that day. It is activated when the KOSDAQ 150 index is down 3% and KOSDAQ 150 futures are down more than 6% for one minute.

As of 9:15 a.m. that day, the KOSDAQ was down 70.85 points (7.07%) at 931.59, retreating from the 1,000 level.