A simple counterexample shows the the widely used WACC approach to value leverage firms developed by Miles and Ezzell can create an arbitrage opportunity. The only consequence to be drawn is that their WACC approach cannot be applied under the circumstances assumed by Miles and Ezzell.

This paper presents a formal derivation of general expressions for Ke and WACC in perpetuities with constant growth, which do not make any assumption on what the proper discount rate is to be applied to the firm's tax shield, and are complemented with numerical examples of its application....

This paper proposes a new discounted cash flows' valuation setup, and derives a general expression for the tax shields' discount rate. This setup applies to any debt policy and any cash flow pattern. It only requires the equality at any time between the assets side and the liabilities side of...

Calculating the cost of capital has been always a key issue in financial management. One way to calculate cost of capital is using the weighted average cost of capital (WACC) formula which has been presented by Modigliani and Miller. Recently, validity and correctness of WACC have been...

This dissertation suggests that the tax savings, in firm valuation, are discounted at a rate computed through a model presented in the literature review, which is different from the rates usually used for this purpose either by the top text books from, for example, Neves (2002), Ross,...