South Korean stocks ended 1.04 percent lower on Monday as investor sentiment remained fragile on nagging concerns about the eurozone debt crisis, analysts said. The local currency hit a nine-month low against the U.S. dollar. The benchmark Korea Composite Stock Price Index (KOSPI) fell 19.16 points to close at 1,820.94, the first decline in three sessions. Trading volume was moderate at 331.5 million shares worth 4.92 trillion won (US$4.4 billion) with losers outpacing gainers 567 to 264.