South Korean stocks plunged after the Democratic Party won both chambers of the U.S. midterm elections, while the won held up relatively well. Foreign investors sold nearly ₩8 trillion, or approximately $5.9 billion, of Korean shares. Against that backdrop, Kiwoom Securities’ top-performing clients nearly tripled their net purchases of SK Hynix from the previous week as chip stocks fell for a second consecutive session. The investors reduced purchases of Samsung Electronics while broadening their buying activity, as South Korean financial authorities moved to prevent forced selling among retail investors heavily concentrated in AI semiconductors.