손익계산서 이익항목 및 가감항목의 정보효과

The K-IFRS revised in November/2011 stipulates that the operating income should be disclosed at comprehensive income statement or footnotes. This revision reflects the situation of Korea's capital market that Korea's investors consider the operating income as the most important index. Furthermore the comprehensive income statements under the revised K-IFRS follow 4-step structure under the K-GAAP. Considering these situation this paper analyze information values of income items and revenue or expense items of income statements under K-GAAP and test results are as follows. First, items of each step including sales carry significant information value independently. Second, From sales item to operating income item, the information value is increasing, but from operating income item to net income item, it is decreasing. Third, the information values of earnings before tax and net income are duplicated, and that of gross sales margin and sales is soaked by operating income item. Fourth, revenue and expense items of each step excluding selling and administrative expense carry significant information values. Fifth, information values of revenue and expense items of each step are not duplicated. Sixth, among the revenue and expense items, cost of goods sold, non-operating expense and non-operating revenue carry additive information values to both the upper income item and lower income item. The cost of goods sold carries additive information value only to the upper income but the tax expense does to only the lower income.