South Korea's stock market has slumped more than 3 percent one year after President Park Geun-hye was sworn in as concerns over the economic slump, the U.S.'s tapering of quantitative easing and emerging market woes dampened investor sentiment here, data showed Sunday. The country's key stock index, the KOSPI, stood at 1,957.83 points on the first anniversary of Park's inauguration, slipping from 2,018.89 points a year ago, according to the data compiled by the bourse operator Korea Exchange.