KOSPI plunged immediately after opening, falling below the 8000 level. At 9 am on the 2nd, KOSPI opened at 7933.10, down 370.31 points (4.46%) from the previous trading day (8303.41). KOSDAQ also opened at 904.53, down 24.82 points (2.67%). Investment sentiment is interpreted to have frozen as semiconductor stocks such as Micron (-10.57%) and SanDisk (-10.62%) plunged in the New York stock market last night. All major stocks are also plummeting. As of 9:07, Samsung Electronics fell 6.84% to 293,000 won, falling below 300,000 won, and SK Hynix also plunged 7.70%, falling to 2,363,000 won. As KOSPI started with a sharp drop on the day, the Korea Exchange announced that it had activated a selling sidecar in the stock market at around 9:07, 7 minutes after opening. KOSPI Sell Sidecar is a device that lowers volatility by stopping program selling for 5 minutes. It is triggered when KOSPI 200 futures fall 5% for 1 minute. On this day, the won-dollar exchange rate in the Seoul foreign exchange market was