South Korea's Kospi plunged as much as 5% Friday, leading another weak session in Asia markets after a tech-led rout on Wall Street.The South Korean index pared losses and was last down 3.20%; the small-cap Kosdaq was down 3.17%.Index heavyweights Samsung Electronics and SK Hynix fell 3.08% and 3.56% respectively, while Hyundai Motor was 5.42% lower. Defense heavyweight Hanwha Aerospace was 5.87% down, while LG Energy Solution lost 3.67%. South Korea's market, which is heavily weighted in favor of companies ...