Beta Geared and Ungeared: Further Analysis of the Case of Active Debt Management

This paper extends previous work by Appleyard and Strong (1989) concerned with the implications of an active debt management policy (ADMP) for de-gearing a geared firm's equity beta. First, alternative derivations of the ADMP beta de-gearing formulae for an MM perfect capital market with corporation tax and for a world with corporation and personal taxes are presented. These derivations do not require the assumption of level perpetuity expected cash flows and therefore indicate a broader basis for the ADMP beta de-gearing formulae than previously demonstrated. Secondly, possible investor valuation errors from use of a PDMP (passive debt management policy) valuation methodology to value firms pursuing an ADMP are analysed in the context of an MM perfect capital market with corporation tax. Given constant (or zero) growth in the firm's expected unlevered cash flows, this analysis indicates that degearing errors from use of the PDMP beta de-gearing formula will only be associated with valuation errors if there is a change in the firm's target debt ratio and that the significance of such valuation errors will be largely dependent on the expected growth rate.