摘要：There are many different ways to calculate the Weighted Average Cost of Capital (WACC) and for the beginner the plethora of possibilities may be very confusing. We present a general framework for classifying the WACCs that are applied to the FCF and the CCF. For the moment, we avoid complexities. To facilitate the discussion, we classify the menagerie of WACCs along three dimensions. We hope that the structured framework assists the reader in making the correct decision with respect to the calculation of the cost of capital in practice. First, we present a qualitative discussion on the dimensions of the framework. Second, we specify the appropriate formulas and calculations for the cells in the framework. At the outset, it is important to stress that this paper is concerned only with finite cash flows. In our judgment, it is best to discuss expressions for the cost of capital that are relevant to finite cash flows and this needs no further justification. The continued use of cost of capital formulas that are appropriate for cash flows in perpetuity is inexplicable and incomprehensible. From a practical point of view, free cash flows are derived from financial statements, which are not constructed in perpetuity. At best, expressions for the cost of capital that are derived from cash flows in perpetuity may be reasonable approximations for finite cash flows. At worst, the results could be misleading.
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