On the 23rd, 'sell sidecars' were successively triggered in the KOSPI and KOSDAQ markets as futures prices plummeted. Accordingly, program sell order effectiveness in both markets was temporarily suspended for five minutes.

■ KOSPI Market: Triggered at 11:40:44 AM The Korea Exchange announced that it triggered a sell sidecar in the securities market at 11:40:44 AM on the same day. At the time of activation, the futures price (the highest-volume stock from the previous trading day) based on KOSPI 200 as the underlying asset was recorded at 1,407.54 points. This represents a decline of 76.06 points (-5.12%) from the base price (1,483.60 points).

As the futures price remained down more than 5% for over one minute, the exchange suspended the effectiveness of program sell orders in the securities market for the next five minutes. This measure was taken in accordance with Article 16 of the Securities Market Business Regulations.

■ KOSDAQ Market: Triggered at 11:37:50 AM At 11:37:50 AM on the same day, a temporary suspension of program sell order effectiveness (sidecar) was first triggered in the KOSDAQ market.

As of the time of activation, the KOSDAQ 150 futures price stood at 1,667.80 points, plunging 106.70 points (-6.01%) from the previous day's closing price (1,774.50 points). The KOSDAQ 150 spot index also fell to 1,653.67 points, down 93.26 points (-5.33%) from the previous day's close (1,746.93 points).

The exchange explained that as the volatility conditions for both the KOSDAQ 150 futures price and the KOSDAQ 150 spot index were met, it suspended the effectiveness of program sell orders for the next five minutes. The measure is based on Article 13 of the KOSDAQ Market Business Regulations and Article 14 of the Enforcement Rules of the same regulations.