“Homemade” Diversification vs. Corporate Diversification

Abstract

In a recent article in this Journal, Jacob B. Michaelson and Robert C. Goshay (hereafter M-G) argue that the rule of maximizing share values does not adequately explain the portfolio selection practices of financial intermediaries. Moreover, M-G suggest that their analysis “has ramifications that reach far beyond financial intermediaries.” In particular, they state that “the asset holdings of conglomerate firms and the rationale for mergers may not be fully explicable in terms of maximizing behavior.”