This document discusses the differences between ROCE (return on capital employed) and ROIC (return on invested capital). ROCE uses book values from the balance sheet in the calculation, while ROIC uses market values. Comparing ROCE to WACC (weighted average cost of capital), which is a market-derived rate, does not provide an apples-to-apples comparison. Using ROIC instead allows for a proper comparison by putting both figures on the same valuation basis using market values rather than book values. There is no consensus on a single definition of ROIC or ROCE as various sources provide different formulations, but the key point is the numerator should have a logical relationship to the denominator.