SHARE prices on South Korea's stock exchange are expected to be sluggish this week amid jitters about global markets and foreign selling. 'Foreigners have shifted from buying to selling amid the continuing instability in overseas markets,' Lee Dae-hyong of LG Securities said. In addition, the withdrawal of Ford from the auction for Kia Motors is expected to have a negative impact on market sentiment, Mr Lee said. On Saturday, the Composite Index decreased 0.28 point, or 0.09 per cent, at 320.33. Volume amounted to 49.7 million shares worth 226.5 billion won (about HK$1.28 billion). Gains led losses 385 to 347, with 125 stocks unchanged. 'The market mood was especially depressed by reports that Merrill Lynch has downgraded [Korea Electric Power Co's, or Kepco's] weighting,' LG Securities' Mr Lee said. Kepco, which accounts for 18 per cent of the Composite Index, dropped 1.4 per cent to 18,150 after Merrill Lynch downgraded its recommendation for the company's shares to 'reduce' from 'neutral', newspapers reported. Merrill Lynch cited the company's tight liquidity and renewed Asian crisis, the newspapers said. Pohang Iron & Steel shed 450 won to 45,800 won on 34,110 shares. Hyundai Motor fell 200 won to 13,800 won on 17,310 shares. But Samsung Electronics edged up 100 won to 42,600 won on 326,250 shares.