SEOUL - South Korean stocks plunged more than 7 percent Thursday as major chipmakers extended losses amid growing concerns over the sustainability of artificial intelligence (AI)-related investments and rate hikes by the Federal Reserve. The Korean won weakened against the U.S. dollar.After opening 5.59 percent lower, the benchmark Korea Composite Stock Price Index (KOSPI) extended its losses, tumbling 454.59 points, or 7.57 percent, to end at 5,554.22, after dipping as low as 5,450.81.The KOSPI fell for the seventh consecutive session, marking its longest losing streak since September 2024…READ FULL ARTICLE