current net income; net profit for the period
Accounting term for the net profit or net income of a company for the current fiscal period (often a year). Used in financial reports and business news.
Current net income for this period increased by 10% compared to the previous year.
It was announced in the financial report that current net profit fell into the red.
当期純利益 is the final bottom-line profit after taxes and extraordinary items, whereas 経常利益 is measured before taxes and extraordinary items.
Compound of 当期 (current period) + 純利益 (net profit). A straightforward business term with no irregular etymology.