South Korea\'s state-run Korea Gas Corp. (KOGAS) said Thursday that it has floated two kinds of bonds worth 350 million Swiss francs (US$399 million) to finance its overseas resource development projects. Five-year bonds carry an interest rate of 2 percent, or 1.17 percentage points higher than the Swiss key rate, KOGAS said, adding bonds that mature in eight years were sold at an interest rate of 2.875 percent, 1.5 percentage points more than the key rate.