[South Korea KOSPI Index Opens Higher but Closes Lower, Down 2.28%] Reported by Jinse Finance, on May 12, South Korea's stock market opened higher but closed lower, with the KOSPI Index down 2.28% on Tuesday, closing at 7,644.03 points. During intraday trading, the KOSPI Index briefly approached 8,000 points before sharply retreating. Heavyweight stocks SK Hynix closed down 2.4%, and Samsung Electronics closed down 2.3%. On the news front, the South Korean Financial Supervisory Service recently expressed concerns about signs of overheating in the stock market and the expansion of margin trading balances, emphasizing the need to be cautious about excessive leveraged investments. Additionally, the Chief of Policy at South Korea's Presidential Office proposed that the government should consider using excess profits generated by AI to levy taxes and distribute "dividends" to all citizens. (Jin10)