Using ex-day returns to separate the tax and information effects of dividend changes

In this paper, the information content of dividends is tested by examining the abnormal return on the announcement date. To address the potentially confounding effects of the tax penalty, the abnormal ex-dividend day return is used to separate stocks for which dividends impose a tax penalty on marginal investors from stocks for which dividends provide a tax benefit to marginal investors. This separation uncovers results that support the information content hypothesis; dividend increases result in positive abnormal announcement day returns even for stocks whose marginal investors are averse to dividends.