What ROIC measures
ROIC isolates operating performance from capital structure decisions by using NOPAT (Net Operating Profit After Tax) in the numerator. This makes it superior to ROE for comparing companies with different leverage levels.
The key value-creation test: if ROIC > WACC, each incremental dollar of capital invested generates positive economic value. If ROIC < WACC, the company is destroying value despite potentially showing positive accounting profits.