Return on capital
（重定向自Roic）
Return on capital (ROC), or return on invested capital (ROIC), is a ratio used in finance, valuation, and accounting. The ratio is estimated by dividing the after-tax operating income (NOPAT) by the book value of both debt and equity capital less cash/equivalents. ROIC is a useful measure for comparing the relative profitability and value-creating potential of companies after taking into account the amount of initial capital invested.