The KOSPI, which started higher, turned downward and moved further away from the 7,000 mark. Amid external headwinds such as a surge in U.S. Treasury yields, the market closed down 1.55% as massive net selling by institutions and profit-taking volume poured in. On the 18th, the KOSPI index closed at 6,869.83, down 108.11 points (1.55%) from the previous trading day. 7, which rose 149.83 points (2.15%) from the previous trading day