Debenture

A debenture is an unsecured debt instrument backed only by the issuer's general creditworthiness and promise to pay, not by any specific asset or collateral. If the issuer defaults, debenture holders rank as unsecured creditors in bankruptcy and recover only after secured creditors have been paid from collateral proceeds. Corporations and governments use debentures widely because they can raise capital without pledging specific assets. Your entire claim as a debenture holder rests on the issuer's financial strength.

In the United Kingdom and several Commonwealth countries, "debenture" is used more broadly to describe any bond, secured or unsecured. In the United States, debenture specifically means unsecured long-term corporate debt.

How Debentures Differ From Secured Bonds

The distinction comes down to recovery in default. A secured bondholder has a legal claim on specific assets: a building, a piece of equipment, or a pool of receivables. If the issuer fails, the trustee sells those assets and pays secured creditors first. Whatever remains goes to unsecured creditors, including debenture holders.

Because debenture holders take more risk, they demand higher yields than secured bondholders from the same issuer. That yield premium compensates you for the absence of an asset backstop.

Types of Debentures

Debentures come in several formats, each suited to different issuer needs and investor preferences.

• Convertible debentures: Give holders the option to convert the debt into equity at a preset ratio after a defined date. Investors accept a lower coupon rate in exchange for the conversion option, which creates upside if the company's stock price rises.
• Non-convertible debentures: Standard debt with no equity conversion feature. Higher coupon than convertible versions from the same issuer, because there is no embedded option to compensate investors.
• Subordinated debentures: Rank below other unsecured debt in the event of default. Even riskier than senior unsecured debentures and priced to reflect that additional subordination.
• Perpetual debentures: Have no maturity date. The issuer pays interest indefinitely and never repays principal unless they choose to call the bond. Utility companies have historically used perpetual structures.

Debentures vs. Corporate Bonds

Why Investment-Grade Companies Can Issue Debentures

An investment-grade company with strong cash flow, a long operating history, and minimal debt can issue debentures that investors accept even without collateral. The company's credit rating is the substitute for an asset pledge. Apple, Microsoft, and U.S. Treasury bonds are all effectively debentures in the practical sense: there is no specific asset backing them, only the issuer's ability to generate cash and honor its obligations.

A speculative-grade issuer attempting to sell unsecured debentures faces a much harder market. Without collateral and without a strong credit rating, investors demand yields that may make the cost of capital prohibitive. Those issuers typically offer secured bonds or accept the higher coupon cost of subordinated unsecured debt.

Sources

• https://www.sec.gov/cgi-bin/browse-edgar
• https://www.sifma.org/resources/research/us-bond-market-statistics/