South Korean stocks nosedived more than 8 percent Monday, extending their losing streak to a third consecutive session, as investors dumped market heavyweights on renewed woes over artificial intelligence (AI) profitability and concerns over a possible hawkish pivot of the U.S. Federal Reserve . The local currency rose against the U.S. dollar after opening at a 17-year low, in the face of verbal intervention by financial authorities. The benchmark Korea Composite Stock Price Index (KOSPI)