We review the literature on the issuance motives, shareholder wealth effects, and design of convertible bonds. Empirical studies on convertible debt issuance mainly focus on testing the predictions of four traditional theoretical models based on convertibles' potential to mitigate agency or adverse selection costs, and obtain mixed evidence. Recent studies on shareholder wealth effects of convertible bond issues highlight the need to control for arbitrage-related short selling and post-issuance risk changes. Studies on the determinants of convertible bond design uncover earnings management, as well as catering incentives to convertible arbitrage funds, as important determinants of innovations in convertible bond characteristics. Overall, our review indicates that recent empirical research on convertible debt provides valuable insights into issue motives and determinants of financial innovations, but also considers the broader question of how investor demand characteristics impact corporate finance decisions. We conclude with an overview of potential research questions to be addressed by future research on hybrid securities.

We analyze call announcement returns taking into account two recent developments in the convertible bond market: the inclusion of dividend protection clauses in convertibles' terms, and the high fraction of convertible issues purchased by hedge funds. Calls of dividend-protected convertible bonds are predictable, yet we still observe a negative stock price reaction that cannot be explained by signaling. Greater hedge fund involvement prior to a call means less short selling in response to the call and we document a reduced price reaction. We conclude that price pressure and not signaling underlies the negative announcement effect of convertible bond calls.