The KOSPI jumped nearly 2% to above 2,860 on Monday, marking its highest level in nearly nine months, fueled by optimism over US–South Korea tariff agreement. Market optimism grew after US President Trump and South Korean President Lee Jae-myung agreed to begin negotiations on a new tariff deal aimed at satisfying both sides. This move is expected to ease trade tensions and benefit Korea’s export sectors like semiconductors, autos, and shipbuilding. On the corporate front, key gainers included SK Hynix (2.90%), Samsung Electronics (1.18%), Hyundai Motor (3.01%), and KB Financial Group (1.51%). However, LG Energy Solution (-3.09%) and Hanwha Aerospace (-3.87%) declined. The potential for reduced tariffs and stronger trade ties lifted investor confidence, especially in tech and manufacturing, signaling a positive outlook for Korea’s export-driven economy.