코스피, 8.4% 급등 마감…7,800선 회복 / KBS 2026.05.21. KBSNews 0 9 05.21 17:18 https://www.youtube.com/watch?v=C1exzYiTSfI + 0 https://www.youtube.com/feeds/videos.xml?channel_id=UCcQTRi69dsVYHN3ex… + 0 코스피, 8.4% 급등 마감…7,800선 회복 / KBS 2026.05.21.