Changes in Capital Structure, New Equity Issues, and Scale Effects

This study determines the impact of a new issue of common stock on security holder wealth and the magnitude attributable to transaction costs, tax shield dilution, wealth transfers, and informational content. The empirical results indicate that shareholders of firms announcing new equity issues experience significant, abnormal, negative returns. The per share transaction cost accounts for 22.6 percent of the observed abnormal return. The tax shield dilution effect accounts for 7.8 percent. No evidence of a wealth transfer effect is found. Thus, approximately 70 percent of the abnormal return can be attributed to new unfavorable information that becomes available to the market.