Korea Zinc Inc on Friday reported its first-quarter net income of 112.4 billion won (US$82.5 million), down 18.8 percent from a year earlier. The company said in a regulatory filing that operating profit for the January-March period rose 26.6 percent on-year to 184.5 billion won. Sales decreased 6 percent to 2.37 trillion won. The earnings fell short of market expectations. The average estimate of net profit by analysts stood at 141.8 billion won, according to a survey by Yonhap Infomax, the financial data firm of Yonhap News Agency. Source: Yonhap News Agency