Seoul's stock market experienced a more than 1 percent decline on Wednesday, ending a six-day winning streak, largely due to investor disappointment over a new stock index set to launch the following week. The Korea Composite Stock Price Index fell by 1.34 percent to 2,569.32 points, with trading volume reaching 441.8 million shares valued at 11.4 trillion won. Retail investors and institutions collectively purchased 585.7 billion won in local shares to counterbalance foreign investors' acquisition of 573.1 billion won. The unveiling of the value-up index by the Korea Exchange after the market closed on Tuesday had a notable impact, particularly on financial shares, which had been anticipated to benefit from the new index. Companies like KB Financial, Shinhan Financial, and Samsung Life Insurance saw significant declines, while some firms like SK hynix and LG Chem managed to post gains amidst the overall market downturn. The local currency also strengthened against the US dollar, trading at 1,331 won per dollar by 3:30 p.m.