Svmuu News Geopolitical tensions between the U.S. and Iran escalated, intensifying market concerns. Japanese and South Korean stock markets closed sharply lower on Monday. The South Korean KOSPI index closed on Monday, March 23, down 375.45 points, a decline of 6.49%, at 5405.75 points. The Nikkei 225 index closed on Monday, March 23, down 1857.04 points, a decline of 3.48%, at 51515.49 points. (Jin10)