South Korean shares start week lower ahead of BOK rate decision, Powell's speech

South Korean stocks fell on Monday ahead of key monetary policy updates from the U.S. Federal Reserve and Bank of Korea. The KOSPI index dropped 0.44%, led by losses in major chipmakers such as Samsung Electronics and SK Hynix. Foreign investors sold shares worth 174.7 billion won, while certain e-commerce and biopharmaceutical stocks showed gains.