South Korean stocks soared 4.83 percent on Tuesday as foreigners shifted to net buyers on eased woes over a U.S. economic downturn and the European debt crisis, analysts said. The local currency gained ground against the U.S. dollar. The benchmark Korea Composite Stock Price Index (KOSPI) jumped 85.56 points from Friday to close at 1,879.87. Trading volume was heavy at 413 million shares worth 6.9 trillion won (US$6.45 billion), with gainers far outnumbering losers 800 to 81. The South Korean financial markets were closed Monday for Liberation Day.