Capital Gains and the Capital Asset Pricing Model

Abstract

This paper shows that, in the presence of differential taxation of ordinary income and capital gains, use of the Officer (1994) version of the Capital Asset Pricing Model can result in significant misestimation of the cost of equity capital. In particular, with a high dividend yield, the cost of equity may be underestimated by four percentage points. Underestimation is of particular significance in the context of setting output prices for regulated utility firms.