CONVERTIBLE DEBT AND INVESTMENT INCENTIVES

In this paper we examine the effect of convertible debt on the investment incentives facing stockholders. The effect depends critically on the value of existing assets relative to the firm's investment requirements. With a restrictive dividend covenant, convertible debt mitigates the overinvestment incentive associated with risky debt but exacerbates the underinvestment incentive at higher values of existing assets. A less-restrictive dividend covenant exacerbates overinvestment under straight debt financing but reduces the underinvestment incentive induced by the conversion feature. In this context, a convertible debt contract with a less-restrictive dividend covenant maximizes firm value.     

THE CHOICE BETWEEN CALLABLE AND NONCALLABLE BONDS

We examine the choice and the offer spreads between callable and noncallable bonds. We find significant differences by industry sector and therefore segment our results by financial and nonfinancial industries. For the financial sector, the popularity of callable and noncallable bonds is significantly related to the economic environment. Financial and high‐grade nonfinancial callable bonds are also more likely to be issued via a shelf prospectus. Although firms that issue callable bonds do not consistently display the characteristics associated with severe agency problems, the issue choice for below‐investment‐grade nonfinancial and lower rated financial bonds, where we can expect agency problems to be more severe, is more consistent with agency theory than is the issue choice for higher rated bonds.     

UNDERSTANDING THE DESIGN OF CONVERTIBLE DEBT

There are now two dominant theories of convertible debt held by academic economists. One theory which has been called the "risk-shifting" hypothesis–effectively views convertibles as an alternative to straight debt. The second–known as the "sig-nalling" (or "backdoor-equity") theory-treats convertibles as an alternative to ordinary equity. This article attempts to unify (or at least to illustrate the relationship between) these two theories by focusing on the design of the securities.
In structuring a convertible, managers and their investment bankers must make a variety of decisions. Besides the coupon rate, face value, issue size, and maturity, managers must also decide the conversion ratio (the number of shares promised per bond) and the amount of call protection afforded investors. Several of these design features have the effect of making a convertible more like a straight debt or a straight equity issue. The hypothesis underlying the authors' recent research is that the issuers of debt-like convertibles are attempting to address a somewhat different financing challenge than the issuers of convertibles that behave more like equity. Their findings suggest that the primary aim of "debt-like" convertible issues is to address investors' uncertainty and concerns about risk, whereas the main goal of "equity-like" convertibles is to minimize the "information costs" associated with raising new equity.     

THE LONG-RUN PERFORMANCE OF CONVERTIBLE DEBT ISSUERS

We examine the long-run operating and stock price performance of 828 convertible debt issuers. Relative to matched, nonissuing firms, convertible debt issuers have small improvements in operating performance before the offer and significant declines in operating performance from pre- to post-issue. We examine the relation between several factors and operating performance. We find that for some pre- to post-issue periods, operating performance changes are positively related to firm leverage and the callability of the bond, and negatively related to performance run-up before the offer and investment in new assets. We also find some evidence that firms that issued equity in the three years before their convertible debt issue have larger declines in performance after the offer. Relative to matched, nonissuing firms, convertible debt issuers have superior stock price performance before the offer and significantly poor performance after the issue.     

TAKEOVER EXPOSURE, AGENCY, AND THE CHOICE BETWEEN PRIVATE AND PUBLIC DEBT

We examine how governance characteristics are related to the corporate choice between public and private debt. We find that firms with fewer takeover defenses and larger outside blockholder ownership are more likely to borrow from banks and to issue 144A debt. We also document that public debt cost is more sensitive to takeover exposure than bank debt cost. These results are consistent with the hypothesis that banks mitigate the expected negative effect of takeovers on debt value through covenants and debt renegotiations. Moreover, we show that firms with weaker internal monitoring are less likely to borrow from banks.     

CONVERTIBLE BONDS: MATCHING FINANCIAL AND REAL OPTIONS

For companies whose value consists in large part of “real options”‐ growth opportunities that may (or may not) materialize‐convertible bonds may offer the ideal financing vehicle because of the matching financial options built into the securities. This paper proposes that convertible debt can be a key element in a financing strategy that aims not only to fund current activities, but to give companies access to low‐cost capital if and when their real investment options turn out to be valuable. In this sense, convertibles can be seen as the most cost‐effective solution to a sequential financing problem‐how to fund not only today's activities, but also tomorrow's growth opportunities (some of them not yet even foreseeable). For companies with real options, the ability of convertibles to match capital inflows with corporate outlays adds value by minimizing two sets of costs: those associated with having too much (particularly equity) capital (known as “agency costs of free cash flow”) and those associated with having too little (“new issue” costs). The key to the cost‐effectiveness of convertibles in funding real options is the call provision. Provided the stock price is “in the money” (and the call protection period is over), the call gives managers the option to force conversion of the bonds into equity. If and when the company's investment opportunity materializes, exercise of the call feature gives the firm an infusion of new equity (while eliminating the debt service burden associated with the convertible) that enables it to carry out its new investment plan. Consistent with this argument, the author's recent study of the investment and financing activities of 289 companies around the time of convertible calls reports significant increases in capital expenditures starting in the year of the call and extending three years after. The companies also showed increased financing activity following the call, mainly new long‐term debt issues (many of them also convertibles) in the year of the call.     

CONVERTIBLE DEBT AND RISK‐SHIFTING INCENTIVES

I argue that convertible debt, in contrast to its perceived role, can produce shareholders’ risk‐shifting incentives. When a firm's capital structure includes convertible debt, every investment decision affects not only the distribution of the asset value but also the likelihood that the debt will be converted and thereby the distribution of the firm's leverage. This suggests that managers can engage in risk‐increasing projects if a higher asset risk generates a more favorable distribution of leverage. Empirical evidence using 30 years of data supports my argument.     

THE INTERACTION BETWEEN PRICING AND UNDERWRITING SPREAD IN THE NEW ISSUE CONVERTIBLE DEBT MARKET

The objective of this research is to measure the interaction among pricing variables in new issues of convertible debt. In underwriting convertible debt issues, there is a simultaneous tradeoff among the conversion premium, yield, and underwriting spread. Since the three endogenous variables are interrelated, a simultaneous equation model is used to test for this interaction. Based on a sample of 264 new convertible debt offerings, the results indicate underpricing in terms of conversion premium and yield as well as simultaneous increases in yield and underwriting spread.