South Korea, Asia's recent wonder market, which had crammed on 52% since 11 September, was the hardest hit as foreigners dumped stock in its semiconductor giants, and the Kospi stumbled 32.28 points, or almost 5%, to 672.22. Rumblings that South Korea's recent consumption boom was being funded by heavy personal borrowing raised fears about the loan base of the country's still largelyunreconstructed banks and added to concerns about the depth of the stock market rally.