Samsung SDI Co. on Wednesday reported its third-quarter net profit of 230.4 billion won (US$166.6 million), down 63 percent from a year earlier.The company said in a regulatory filing that it posted 129.9 billion won in operating profit for the quarter, compared with 465.2 billion won a year ago. Revenue fell 29.8 percent to 3.93 trillion won.The earnings failed to meet market expectations. The average estimate of net profit by analysts stood at 254.8 billion won, according to a survey by Yonhap Infomax, the financial data firm of Yonhap News Agency.Source: Yonhap News Agency