SEOUL, July 7 (UPI) -- Mirae Asset Securities and KB Securities topped South Korea's initial public offering market during the first six months of this year. According to Korea Exchange's first-half data Monday, Mirae Asset Securities was next to none in the deal count, while KB Securities dominated in total offering value. Mirae Asset underwrote a total of nine IPOs, including such major deals as Seoul Guarantee Insurance, the country's only comprehensive guarantee provider. Samsung Securities